Saturday April 27, ARISS contact with school in Italy. Downlink audible in Europe.
An
International Space Station school contact is scheduled with
participants at Istituto d’Istruzione Superiore Euclide, Bari, Italy.
Astronaut will be Tom Marshburn KE5HOC. The event is to begin at
approximately 11:17 UTC, which is 13:17 CEST.
The contact will be
a direct operated by IZ7RTN. Interested parties in Europe are invited
to listen to downlink signals on 148.800MHz FM.
School presentation:
Euclide
School is a high school. It is an aeronautical school in Bari. There
are boys and girls, aged 14-18. Bari is located in the South-east of the
APULIA region, South-east of Italy. In its Curriculum the school focus
on: aeronautical studies, Media Communication, Space Communication, the
Environment, Science activities in lab. In this school there are the
following laboratories: a chemistry; a physics; CAD; Topography and
Photogrammetry; Aerotechnics; Radio and Radar Systems; Informatics (2
labs); Air Navigation; Meteorology; Air Traffic; There are also: an
outdoor multigame Basketball/Volleyball court; a library with several
PC; a staff room with a PC; a press office; HDSL Internet connection;
an auditorium; 30 classrooms.
Students will ask as many of following questions as time allows:
1) How do you live floating in the space station?
2) What is the most dangerous phase in a space mission?
3) You have seen the earth from a space ship window, what idea did you have about global warming?
4) Space tourism is a future possibility. Are you for the idea of a common man in space?
5) To be an astronaut is the biggest dream for a child. Has it been a dream since you was a child too?
6) What high teach evolution will there be thanks to astronautics?
7) What studies have you carried out to undertake the career as an astronaut?
8) How does the space station function?
9) What are the appliances that the station uses to establish your bearing?
10) How to you keep trade of time?
11) What are the consequences on your body caused by life without gravity?
12) What kind of training do you get before the mission?
13) What kind of experiment do you carry out in the laboratories of the space station?
14) How long did it take you to reach the space station?
15) What kind of risks are you exposed to during EVA activity?
16) Which are the purposes of the chemical experiments that you are perform in the space station?
17) What are the risks encountered in the space station?
18) Which utilities can the data obtained in your labs have?
19) What kind of study are you doing on the ISS now?
20) How have you been chosen to become astronauts?
ARISS
is an international educational outreach program partnering the
participating space agencies, NASA, Russian Space Agency, ESA, CNES,
JAXA, and CSA, with the AMSAT and IARU organizations from participating
countries.
ARISS offers an opportunity for students to experience
the excitement of Amateur Radio by talking directly with crewmembers
onboard the International Space Station. Teachers, parents and
communities see, first hand, how Amateur Radio and crewmembers on ISS
can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
ARISS educational contact with school in Italy. Correction.
There is a typo in the message about the contact Saturday April 27 with Istituto d’Istruzione Superiore Euclide, Bari, Italy.
Downlink frequency is 145.800MHz, as usual.
Thanks to Jürgen DL4YCD and to Yves ON4KCY for drawing attention.
73, Gaston - ON4WF
ARISS-Europe Chair
F6AGV : ACTUALITE du RADIO AMATEURISME
samedi 27 avril 2013
mardi 23 avril 2013
ARISS le 25 avril 2013 CANADA
Thursday 25 April 2013 ARISS contact with school in Nunavut, Canada. Downlink audible in Europe.
An International Space Station school contact is scheduled with participants at Maani Ulujuk High School, Rankin Inlet, Nunavut, Canada. Astronaut will be Chris Hadfield KC5RNJ/VA3OOG. The event is to begin at approximately 14:34:36 UTC, which is 16:34:36 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
Maani Ulujuk Ilinniarvik (MUI) is located in Rankin Inlet, Nunavut (Population Approximately 3000) on the North west side of Hudson Bay. It is one of three schools in the Rankin Inlet system and hosts grades 7 -– 12. The current Maani Ulujuk building is approximately 32 years old and is the second of two buildings with the same name; the first being destroyed by fire. MUI was named after an Elder( Maani Ulujuk), who at the time of its naming, was the oldest elder in the community. There are 353 students, 24 teachers, 6 Student Support Assistants, 1 Secretary, 1 School Community Counsellor and 2 caretakers.
Even though we don’t have a space club, we do have a vibrant Science program which hosts a science fair annually and students have been exposed to the space program in the curriculum. Students and staff were excited last year when we were slated to do a space hookup in April; however, it did get cancelled and we are pleased that it is on again for this year.
Students at MUI are great young leaders and they love to participate in novel events such as contacting the astronauts on the Space Station. This will be an awesome event and we look forward to participating.
Participants will ask as many of the following questions as time allows:
1. Is it different breathing on Space Station than on earth?
2. How many toilets are on space station and how long does it take to train to use them?
3. What do you eat and can you eat everything you do on earth?
4. How long did you train to become an Astronaut?
5. What do you wear daily and does your Space Suit need to be near in case of emergencies?
6. How long did it take you to travel to Space Station and is coming back the same?
7. How many people are on board with you and what is the most amount of people at one time?
8. How long will you be on Space Station and how long could you stay?
9. How do you wash and how often?
10. How fast is the Space Station travelling and can you feel it?
11. Can you see the Northern Lights from up there?
12. Do you see sunsets and sunrises?
13. What's the coolest or most interesting thing you have seen so far?
14. How often do you contact Family and/or Friends?
15. Will you ever go back into Space after this mission?
16. Did you have fun singing with the Bare-naked Ladies Band?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA,
JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
An International Space Station school contact is scheduled with participants at Maani Ulujuk High School, Rankin Inlet, Nunavut, Canada. Astronaut will be Chris Hadfield KC5RNJ/VA3OOG. The event is to begin at approximately 14:34:36 UTC, which is 16:34:36 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
Maani Ulujuk Ilinniarvik (MUI) is located in Rankin Inlet, Nunavut (Population Approximately 3000) on the North west side of Hudson Bay. It is one of three schools in the Rankin Inlet system and hosts grades 7 -– 12. The current Maani Ulujuk building is approximately 32 years old and is the second of two buildings with the same name; the first being destroyed by fire. MUI was named after an Elder( Maani Ulujuk), who at the time of its naming, was the oldest elder in the community. There are 353 students, 24 teachers, 6 Student Support Assistants, 1 Secretary, 1 School Community Counsellor and 2 caretakers.
Even though we don’t have a space club, we do have a vibrant Science program which hosts a science fair annually and students have been exposed to the space program in the curriculum. Students and staff were excited last year when we were slated to do a space hookup in April; however, it did get cancelled and we are pleased that it is on again for this year.
Students at MUI are great young leaders and they love to participate in novel events such as contacting the astronauts on the Space Station. This will be an awesome event and we look forward to participating.
Participants will ask as many of the following questions as time allows:
1. Is it different breathing on Space Station than on earth?
2. How many toilets are on space station and how long does it take to train to use them?
3. What do you eat and can you eat everything you do on earth?
4. How long did you train to become an Astronaut?
5. What do you wear daily and does your Space Suit need to be near in case of emergencies?
6. How long did it take you to travel to Space Station and is coming back the same?
7. How many people are on board with you and what is the most amount of people at one time?
8. How long will you be on Space Station and how long could you stay?
9. How do you wash and how often?
10. How fast is the Space Station travelling and can you feel it?
11. Can you see the Northern Lights from up there?
12. Do you see sunsets and sunrises?
13. What's the coolest or most interesting thing you have seen so far?
14. How often do you contact Family and/or Friends?
15. Will you ever go back into Space after this mission?
16. Did you have fun singing with the Bare-naked Ladies Band?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA,
JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
dimanche 21 avril 2013
ARISS le 23 avril 2013 aux USA
Tuesday April 23, ARISS contact with school in Maine, USA. Downlink audible in Europe.
An International Space Station school contact is scheduled with participants at Bates College Museum of Art, Lewiston, Maine, USA. Astronaut will be Christopher J. Cassidy, KF5KDR. Maine is Cassidy’s home state. The event is to begin at approximately 14:38:47 UTC, which is 16:38:47 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
In an arrangement proposed by the Bates College Museum of Art in conjunction with our 2012 exhibition Starstruck: The Fine Art of Astrophotography, local 8th Grade students are preparing to talk with astronauts on the International Space Station in April through the Amateur Radio on the International Space Station program (ARISS). Please keep up-to-date on contact details through bates.edu/museum/events/
Students from the Auburn and Lewiston middle schools will take part in the live radio communication. Members of ARISS were excited by how our project brought the world of art and creativity into a program aimed at science, technology, engineering and math classrooms. To prepare for the contact, students visited the exhibition as part of their space science unit, researched comets and geomagnetic storms, modeled the solar system, explored citizen-science projects like Galaxy Zoo, and, using NASA’s Astronomy Picture of the Day as a model, researched Starstruck images and wrote paragraphs explaining their significance.
It is gratifying to see an art exhibition ignite so much interest in such a wide variety of subjects, and especially to see a reunification of art and science achieved through this exhibition and the ARISS program.
Senators Angus King and Susan Collins and Congressman Michael Michaud have been invited to attend the event.
Participants will ask as many of the following multilingual questions as time allows:
1. Alex: What are the biggest struggles of living on the Space Station?
2. Julia M: What would you like to see NASA accomplish soon such as a manned mission to Mars to extensive zero-gravity experiments?
3. Emily R: In your opinion, what are the most beneficial or useful experiments in space?
4. Abshir A: Does all of the electricity come from the solar panels or is there another natural resource that the ISS uses?
5. Emily R: How will determining the accuracy of the MRI help doctors here on Earth?
6. Thomas J: After all of your training, what was your hardest task in space, and what’s your greatest achievement?
7. Brenna E: Have any of the algorithms made by students to operate the spheres satellite on board the space station been successful?
8. Megan G: Explain the training that takes place underwater and its similarity with the feeling in space.
9. Destiny: Has there ever been a surprise illness or emergency, what happened?
10. Kyla H: If I wanted to become an astronaut when I grew up, what advice would you give me?
11. Megan M.: Can any diseases or disabilities be caused by going to space?
12. Leona: Are there ISS experiments that deal with the psychological stresses of being in space or away from loved ones for extended
periods?
13. Paige: What would be the challenges to having a baby or doing surgery in space?
14. Kasey T: What does everything look like outside of the space station? What do the planets, sun and stars look like?
15. Faith R.: What animals are allowed on the ISS?
16. Patric R.: When you launched into space, how many “G”s did you experience on the way up? What does it feel like?
17. Dylan M.: How is working in limited gravity interesting and challenging?
18. Antonio B: What is your biggest fear in space?
19. Rachel: How do you keep the ISS clean?
20. Angelina N: How exactly would you describe the sensation of suddenly going weightless from passing through Earth’s atmosphere?
21. Chase: What kinds of disagreements happen on the ISS and how do you resolve them?
22. Noah: How difficult is it to sleep in space?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
An International Space Station school contact is scheduled with participants at Bates College Museum of Art, Lewiston, Maine, USA. Astronaut will be Christopher J. Cassidy, KF5KDR. Maine is Cassidy’s home state. The event is to begin at approximately 14:38:47 UTC, which is 16:38:47 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
In an arrangement proposed by the Bates College Museum of Art in conjunction with our 2012 exhibition Starstruck: The Fine Art of Astrophotography, local 8th Grade students are preparing to talk with astronauts on the International Space Station in April through the Amateur Radio on the International Space Station program (ARISS). Please keep up-to-date on contact details through bates.edu/museum/events/
Students from the Auburn and Lewiston middle schools will take part in the live radio communication. Members of ARISS were excited by how our project brought the world of art and creativity into a program aimed at science, technology, engineering and math classrooms. To prepare for the contact, students visited the exhibition as part of their space science unit, researched comets and geomagnetic storms, modeled the solar system, explored citizen-science projects like Galaxy Zoo, and, using NASA’s Astronomy Picture of the Day as a model, researched Starstruck images and wrote paragraphs explaining their significance.
It is gratifying to see an art exhibition ignite so much interest in such a wide variety of subjects, and especially to see a reunification of art and science achieved through this exhibition and the ARISS program.
Senators Angus King and Susan Collins and Congressman Michael Michaud have been invited to attend the event.
Participants will ask as many of the following multilingual questions as time allows:
1. Alex: What are the biggest struggles of living on the Space Station?
2. Julia M: What would you like to see NASA accomplish soon such as a manned mission to Mars to extensive zero-gravity experiments?
3. Emily R: In your opinion, what are the most beneficial or useful experiments in space?
4. Abshir A: Does all of the electricity come from the solar panels or is there another natural resource that the ISS uses?
5. Emily R: How will determining the accuracy of the MRI help doctors here on Earth?
6. Thomas J: After all of your training, what was your hardest task in space, and what’s your greatest achievement?
7. Brenna E: Have any of the algorithms made by students to operate the spheres satellite on board the space station been successful?
8. Megan G: Explain the training that takes place underwater and its similarity with the feeling in space.
9. Destiny: Has there ever been a surprise illness or emergency, what happened?
10. Kyla H: If I wanted to become an astronaut when I grew up, what advice would you give me?
11. Megan M.: Can any diseases or disabilities be caused by going to space?
12. Leona: Are there ISS experiments that deal with the psychological stresses of being in space or away from loved ones for extended
periods?
13. Paige: What would be the challenges to having a baby or doing surgery in space?
14. Kasey T: What does everything look like outside of the space station? What do the planets, sun and stars look like?
15. Faith R.: What animals are allowed on the ISS?
16. Patric R.: When you launched into space, how many “G”s did you experience on the way up? What does it feel like?
17. Dylan M.: How is working in limited gravity interesting and challenging?
18. Antonio B: What is your biggest fear in space?
19. Rachel: How do you keep the ISS clean?
20. Angelina N: How exactly would you describe the sensation of suddenly going weightless from passing through Earth’s atmosphere?
21. Chase: What kinds of disagreements happen on the ISS and how do you resolve them?
22. Noah: How difficult is it to sleep in space?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
jeudi 18 avril 2013
CONCORDIA le 18 avril 2013 à 11 heures locale
Brumes et une activité qui semble s'amplifier autour du bateau. Bientôt le redressement du navire ?
Contact : f6agv (AT) free.fr
ARISS le 20 avril 2013 CANADA
Saturday April 20, ARISS contact with school in Canada. Downlink audible in Europe
An International Space Station school contact is scheduled with participants at Gray Mountain Primary School, Whitehorse, Yukon, Canada. The event is to begin at approximately 18:47:50 UTC, which is 20:47:50 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
The incredible opportunity to speak with the I.S.S. and Chris Hadfield has sparked a frenzy of space related themes and ideas throughout our school and inspired the community. Our small school has been transformed into a space education station with student-created learning displays and artwork throughout. The kids have been reading and writing using space to inspire imaginations and incorporating space exploration into math and science lessons. We have a local artist who is coming to build a life size Soyuz spacecraft out of recycled materials with the Grade 2s and 3s and the media is incredibly excited. The entire process is being documented with pictures and video from the ground, which will lead up to the contact and everyone involved is on pins and needles.
Participants will ask as many of the following multilingual questions as time allows:
1. Thomas (9 Yrs.): Can you see the Great Wall of China and other famous landmarks and which is your favorite to view from the space station?
2. Trinity (9 Yrs.): What things can’t you do in space that you can do on earth?
3. Ella (8 Yrs): How big is the space station and do you have enough room to dance?
4. Josh (9 Yrs.): What would happen if there was a fire on the space station, and do you have an escape plan?
5. Jennifer (8 Yrs.): Does your body respond to exercise the same way in space, like your heart rate and sweating?
6. Manraj (9 Yrs.): I was wondering if there is a television on the international space station and do you get many channels?
7. Joseph (9 Yrs.): How much water do you keep on the space station and how do you keep it from freezing?
8. Hayden (8 Yrs.): If you took a plant with you to the space station would the quick changes in light and dark help it or hurt it?
9. Dakota (8 Yrs.): Have you ever walked on any planet or moon other than Earth and do you want to?
10. Samantha (8 Yrs.): How long do you sleep for each night and does the sun keep you awake?
11. Olivia (8 Yrs.): What kind of exercises do you do to keep fit on the space station?
12. Heather (8 Yrs.): How long can you stay up in space without fresh supplies?
13. Alan (9 Yrs.): Can you see and hear the northern lights from in the space station?
14. Leandra (9Yrs.): How do you go in and out of the space station without wasting air?
15. Mason (9 Yrs.): Do you have to be in a military branch to be an astronaut, and what other things do you have to be able to do?
16. Alex (9 Yrs.): What kinds of things do you do to entertain yourself when you don’t have to work?
17. Cadence (9 Yrs.): What would happen to a balloon if you blew it up on the space station and took it outside with you on a spacewalk?
18. Matthew (9 Yrs.): How do you play music in space and what do you like to listen to?
19. Abida (9 Yrs.) or Pat (Teacher): When are you coming to the Yukon to visit our school?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
Source directe : ON4WF
Contact : f6agv (AT) free.fr
An International Space Station school contact is scheduled with participants at Gray Mountain Primary School, Whitehorse, Yukon, Canada. The event is to begin at approximately 18:47:50 UTC, which is 20:47:50 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
The incredible opportunity to speak with the I.S.S. and Chris Hadfield has sparked a frenzy of space related themes and ideas throughout our school and inspired the community. Our small school has been transformed into a space education station with student-created learning displays and artwork throughout. The kids have been reading and writing using space to inspire imaginations and incorporating space exploration into math and science lessons. We have a local artist who is coming to build a life size Soyuz spacecraft out of recycled materials with the Grade 2s and 3s and the media is incredibly excited. The entire process is being documented with pictures and video from the ground, which will lead up to the contact and everyone involved is on pins and needles.
Participants will ask as many of the following multilingual questions as time allows:
1. Thomas (9 Yrs.): Can you see the Great Wall of China and other famous landmarks and which is your favorite to view from the space station?
2. Trinity (9 Yrs.): What things can’t you do in space that you can do on earth?
3. Ella (8 Yrs): How big is the space station and do you have enough room to dance?
4. Josh (9 Yrs.): What would happen if there was a fire on the space station, and do you have an escape plan?
5. Jennifer (8 Yrs.): Does your body respond to exercise the same way in space, like your heart rate and sweating?
6. Manraj (9 Yrs.): I was wondering if there is a television on the international space station and do you get many channels?
7. Joseph (9 Yrs.): How much water do you keep on the space station and how do you keep it from freezing?
8. Hayden (8 Yrs.): If you took a plant with you to the space station would the quick changes in light and dark help it or hurt it?
9. Dakota (8 Yrs.): Have you ever walked on any planet or moon other than Earth and do you want to?
10. Samantha (8 Yrs.): How long do you sleep for each night and does the sun keep you awake?
11. Olivia (8 Yrs.): What kind of exercises do you do to keep fit on the space station?
12. Heather (8 Yrs.): How long can you stay up in space without fresh supplies?
13. Alan (9 Yrs.): Can you see and hear the northern lights from in the space station?
14. Leandra (9Yrs.): How do you go in and out of the space station without wasting air?
15. Mason (9 Yrs.): Do you have to be in a military branch to be an astronaut, and what other things do you have to be able to do?
16. Alex (9 Yrs.): What kinds of things do you do to entertain yourself when you don’t have to work?
17. Cadence (9 Yrs.): What would happen to a balloon if you blew it up on the space station and took it outside with you on a spacewalk?
18. Matthew (9 Yrs.): How do you play music in space and what do you like to listen to?
19. Abida (9 Yrs.) or Pat (Teacher): When are you coming to the Yukon to visit our school?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
Source directe : ON4WF
Contact : f6agv (AT) free.fr
dimanche 14 avril 2013
ARISS le 17 avril 2013 CANADA
Wednesday April 17, ARISS contact with school in Canada. Downlink audible in Europe
An International Space Station school contact is scheduled with participants at John McCrae High School, Nepean, Ontario, Canada. The event is to begin at approximately 18:05 UTC, which is 20:05 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
John McCrae Secondary school is named after the Canadian poet and doctor who during World War I, wrote the famous war memorial poem "In Flanders Fields". With this heritage in mind our school hosts large community Remembrance Day ceremonies every November 11 and celebrates community works of art in the "Red Poppy" gallery.
John McCrae students consistently rank among the best academic performers in the province, gaining post secondary acceptance across North America and winning many entrance scholarships. Our specialty High Performance Athlete program attracts some of the best young athletes in Ottawa and they have contributed to several recent provincial championships.
Participants will ask as many of the following multilingual questions as time allows:
1. Do you ever get claustrophobic and/or have you ever been ill while in Space?
2. Would you be interested in undertaking a long term mission to another planet ?
3. Do other celestial bodies appear different from space station than from earth?
4. Do physical properties like heat radiation, conduction etc, change in Space?
5. When inside a Space Suit, how do you deal with an itch, sickness or possible vomiting?
6. Have you ever seen odd or unexplained sites going past Space Station?
7. What kinds of technology do you have for contacting family or for entertainment?
8. Are most foods and drink available or are you restricted on what you consume?
9. What are the struggles, personal, professional and political on Space Station?
10. What inspired you and what was the most challenging issue in becoming an astronaut?
11. What expansion/ improvements would you like to see on the ISS?
12. What are the day to day activities of the commanding officer on Space Station?
13. Do Physiological functions like sneezing, coughing change in zero gravity?
14. How do you orient yourself, do you use instruments for showing/finding direction?
15. How is personal hygiene managed and how is human waste dealt with?
16. As a Canadian Commanding Space Station, who do you answer too?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA,
ES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the
International Space Station.
Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
An International Space Station school contact is scheduled with participants at John McCrae High School, Nepean, Ontario, Canada. The event is to begin at approximately 18:05 UTC, which is 20:05 CEST.
The contact will be a telebridge operated by IK1SLD, located in North Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
John McCrae Secondary school is named after the Canadian poet and doctor who during World War I, wrote the famous war memorial poem "In Flanders Fields". With this heritage in mind our school hosts large community Remembrance Day ceremonies every November 11 and celebrates community works of art in the "Red Poppy" gallery.
John McCrae students consistently rank among the best academic performers in the province, gaining post secondary acceptance across North America and winning many entrance scholarships. Our specialty High Performance Athlete program attracts some of the best young athletes in Ottawa and they have contributed to several recent provincial championships.
Participants will ask as many of the following multilingual questions as time allows:
1. Do you ever get claustrophobic and/or have you ever been ill while in Space?
2. Would you be interested in undertaking a long term mission to another planet ?
3. Do other celestial bodies appear different from space station than from earth?
4. Do physical properties like heat radiation, conduction etc, change in Space?
5. When inside a Space Suit, how do you deal with an itch, sickness or possible vomiting?
6. Have you ever seen odd or unexplained sites going past Space Station?
7. What kinds of technology do you have for contacting family or for entertainment?
8. Are most foods and drink available or are you restricted on what you consume?
9. What are the struggles, personal, professional and political on Space Station?
10. What inspired you and what was the most challenging issue in becoming an astronaut?
11. What expansion/ improvements would you like to see on the ISS?
12. What are the day to day activities of the commanding officer on Space Station?
13. Do Physiological functions like sneezing, coughing change in zero gravity?
14. How do you orient yourself, do you use instruments for showing/finding direction?
15. How is personal hygiene managed and how is human waste dealt with?
16. As a Canadian Commanding Space Station, who do you answer too?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA,
ES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the
International Space Station.
Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
vendredi 12 avril 2013
Bulletin de l'ANRPFD de la Semaine 15/2013 paru.
Bulletin de l'ANRPFD de la Semaine 15/2013, il est paru.
Nous vous en souhaitons une bonne lecture sur les Ondes et diffusion sur le Net!
Pour les Radioclubs et Radioamateurs vous pouvez en faire la diffusion sur les Ondes.
Afin de diffuser vos manifestations (DMF, DFCF, Expéditions, vos activités de vacances ou dans les écoles, vous pouvez nous envoyer vos informations!
N’HÉSITEZ PAS VOS INFOS SERONT DIFFUSÉES SUR NOTRE SITE DE NEWS!
73 QRO à tous et 88 aux YL de Jacques F6HBN. Président de l'ANRPFD
Les sites de l’Association :
http://www.radioamateurs.news.sciencesfrance.fr/ site de News
http://www.radioamateurs.anrpfd.sciencesfrance.fr/Site associatif
http://www.sciencesfrance.fr/ le Portail de l’Association sur le Web
Source : ANRPFD
Contact : f6agv (at) free.fr
Nous vous en souhaitons une bonne lecture sur les Ondes et diffusion sur le Net!
Pour les Radioclubs et Radioamateurs vous pouvez en faire la diffusion sur les Ondes.
Afin de diffuser vos manifestations (DMF, DFCF, Expéditions, vos activités de vacances ou dans les écoles, vous pouvez nous envoyer vos informations!
N’HÉSITEZ PAS VOS INFOS SERONT DIFFUSÉES SUR NOTRE SITE DE NEWS!
73 QRO à tous et 88 aux YL de Jacques F6HBN. Président de l'ANRPFD
Les sites de l’Association :
http://www.radioamateurs.news.sciencesfrance.fr/ site de News
http://www.radioamateurs.anrpfd.sciencesfrance.fr/Site associatif
http://www.sciencesfrance.fr/ le Portail de l’Association sur le Web
Source : ANRPFD
Contact : f6agv (at) free.fr
mercredi 10 avril 2013
ARISS le 12 avril 2013 CANADA
Friday April 12, ARISS contact with school in Canada. Downlink audible in Europe
An International Space Station school contact is scheduled with participants at Innalik School, Inukjuak, Nunavik, Quebec, Canada, Friday April 12, 2013. The event is to begin at approximately 17:30 UTC, which is 19:30 CEST.
The contact will be a telebridge operated by IK1SLD, located in north Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
Inukjuak is a remote, fly-in Inuit community located on the Hudson Bay in Northern Quebec. Its population is approximately 1 600.
The Inuit of Inukjuak still partake in many cultural practices, for example; constructing sleds or harpoons, sewing traditional garments, training dogsled teams, hunting, fishing and berry picking. However, they also have a window into the modern world and are current on fashion trends, popular music, and breakout phenomena like “Gangnam Style”.
The primary language in the school and in the village is Inuktitut; English and French are secondary languages.
Participants will ask as many of the following multilingual questions as time allows:
1. Can you see Inukjuak from space?
2. What do you eat in space?
3. Do you get scared in space?
4. Is the Internet available on the Space Station and does it work as well as in Inukjuak?
5. How many years do you go to school and train to be an astronaut?
6. How many comets have you seen, and can you see comets better from space than from Earth?
7. Can you see all the planets in space?
8. Have you been to Mars or to the moon?
9. Croyez-vous dans l’existence des extraterrestres?
10. Do you draw on the Space Station?
11. Est-ce que les odeurs se propagent plus vite dans l’espace?
12. Comment est-ce que ton corps est affecté par l’absence de gravité?
13. Where does your facial hair go when you shave in space?
14. How do you shower in space?
15. Comment-faites-vous pour aller à la toilette?
16. Qu’est-ce que vous faites avec l’eau usée?
17. Comment on fait pour dormir dans l’espace? Est-ce qu’on bouge en dormant?
18. How many experiments are you working on? Which is your favourite one?
19. Did the recent meteor that hit Russia cause any issues for Space Station?
20. What would happen if someone on the ISS was critically injured? Have you ever gotten hurt in space?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
An International Space Station school contact is scheduled with participants at Innalik School, Inukjuak, Nunavik, Quebec, Canada, Friday April 12, 2013. The event is to begin at approximately 17:30 UTC, which is 19:30 CEST.
The contact will be a telebridge operated by IK1SLD, located in north Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM.
School presentation:
Inukjuak is a remote, fly-in Inuit community located on the Hudson Bay in Northern Quebec. Its population is approximately 1 600.
The Inuit of Inukjuak still partake in many cultural practices, for example; constructing sleds or harpoons, sewing traditional garments, training dogsled teams, hunting, fishing and berry picking. However, they also have a window into the modern world and are current on fashion trends, popular music, and breakout phenomena like “Gangnam Style”.
The primary language in the school and in the village is Inuktitut; English and French are secondary languages.
Participants will ask as many of the following multilingual questions as time allows:
1. Can you see Inukjuak from space?
2. What do you eat in space?
3. Do you get scared in space?
4. Is the Internet available on the Space Station and does it work as well as in Inukjuak?
5. How many years do you go to school and train to be an astronaut?
6. How many comets have you seen, and can you see comets better from space than from Earth?
7. Can you see all the planets in space?
8. Have you been to Mars or to the moon?
9. Croyez-vous dans l’existence des extraterrestres?
10. Do you draw on the Space Station?
11. Est-ce que les odeurs se propagent plus vite dans l’espace?
12. Comment est-ce que ton corps est affecté par l’absence de gravité?
13. Where does your facial hair go when you shave in space?
14. How do you shower in space?
15. Comment-faites-vous pour aller à la toilette?
16. Qu’est-ce que vous faites avec l’eau usée?
17. Comment on fait pour dormir dans l’espace? Est-ce qu’on bouge en dormant?
18. How many experiments are you working on? Which is your favourite one?
19. Did the recent meteor that hit Russia cause any issues for Space Station?
20. What would happen if someone on the ISS was critically injured? Have you ever gotten hurt in space?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
mardi 9 avril 2013
ARISS le 9 avril 2013 CANADA
Tuesday April 9, ARISS contact with school in Canada. Downlink audible in Europe
An International Space Station school contact is scheduled with participants at Sir George Simpson Jr. High, Albert, AB, Canada, Tuesday April 9, 2013. The event is to begin at approximately 20:00 UTC, which is 22:00 CEST.
The contact will be a telebridge operated by IK1SLD, located in north Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM. The contact will be conducted in English.
School presentation:
Sir George Simpson Public School is a junior high located in St. Albert, Alberta. Currently, we have approximately 540 students enrolled in a variety of programs.
Our school houses several programs: English, French Immersion, Academic Challenge, Learning Assistance, Opportunity, Knowledge and Employability, and Behaviour Improvement.
While learning in their respective programs, all students are invited to rally around our school motto: “Spirit, Growth, Success” in both thought and action.
Simpson offers many extracurricular activities such as Social Justice, Cheerleading, Art Club and our SABLE high altitude balloon club.
Participants will ask as many of the following multilingual questions as time allows:
1. Faith: Does the absence of gravity aboard the ISS affect intracranial pressure?
2. Mike: Si vous pouviez rapporter un souvenir de l'espace, un objet, qu’est-ce vous souhaiteriez apporter su la Terre?
3. Charlea: Do the stars appear brighter from the ISS as compared to Earth and why?
4. Anna: Как вы очистите пространство станции и сделать вашу прачечную?
5. Caleb: If you could have been anything other than an astronaut, what profession would you have chosen?
6. Nicole: Quelle est l’experience la plus difficile que vous avez terminé dans l'espace?
7. Georgia: What cultural experiences have you shared with your fellow astronauts?
8. Celyn: Comment se passe un journee dans l'espace, quelle est votre horaire?
9. Caleb: What do you think would be a beneficial addition to the ISS?
10. Meghan W: Je sais sur l’ISS tu vous le soleil se lever et se coucher environ 16 fois par jour. Est-ce ea mélange tes habitudes de sommeil?
11. Georgia: How is Wi-Fi made available on the ISS and where does the signal come from?
12. Patrick: Quand est-ce que tu as appris à jouer la guitare et pourquoi est-ce que t apporté ta guitare en espace?
13. Faith: In the event of colonization of Mars how will dairy products be provided?
14. Mike: Dans l'espace, est-ce que tu peux voir la pollution? Est-ce qu’il y a un endroit qui est plus pollué que les autres?
15. Charlea: Would the smell or taste of food be different if it was grown in space?
16. Celyn: Est-ce que tu peux voir l’Aurores Boréalis?
17. Caleb: Can you feel jet lagged in space?
18. Pat: Est-ce que tu peux voir toutes les planètes dans l'espace?
19. Georgia: What personal items are you allowed to bring? Is there a maximum mass or volume?
20. Meghan W: Est-ce que tu vas en dehors de la station spatiale?
21. 7 MUR: Is there a difference in the resonance of your guitar or the sustain and sound of the strings in zero G as opposed to Earth?
22. Nicole: Comment est-ce que l’espace a influence ta vie quotidienne et tes valeurs et croyances?
23. Tammy, Nicole, and Rob: Si tu pouvais prendre quelqu'un avec toi, qui serait-il? Pourquoi?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
An International Space Station school contact is scheduled with participants at Sir George Simpson Jr. High, Albert, AB, Canada, Tuesday April 9, 2013. The event is to begin at approximately 20:00 UTC, which is 22:00 CEST.
The contact will be a telebridge operated by IK1SLD, located in north Italy. Interested parties in Europe are invited to listen to dowlink signals on 145.800 MHz FM. The contact will be conducted in English.
School presentation:
Sir George Simpson Public School is a junior high located in St. Albert, Alberta. Currently, we have approximately 540 students enrolled in a variety of programs.
Our school houses several programs: English, French Immersion, Academic Challenge, Learning Assistance, Opportunity, Knowledge and Employability, and Behaviour Improvement.
While learning in their respective programs, all students are invited to rally around our school motto: “Spirit, Growth, Success” in both thought and action.
Simpson offers many extracurricular activities such as Social Justice, Cheerleading, Art Club and our SABLE high altitude balloon club.
Participants will ask as many of the following multilingual questions as time allows:
1. Faith: Does the absence of gravity aboard the ISS affect intracranial pressure?
2. Mike: Si vous pouviez rapporter un souvenir de l'espace, un objet, qu’est-ce vous souhaiteriez apporter su la Terre?
3. Charlea: Do the stars appear brighter from the ISS as compared to Earth and why?
4. Anna: Как вы очистите пространство станции и сделать вашу прачечную?
5. Caleb: If you could have been anything other than an astronaut, what profession would you have chosen?
6. Nicole: Quelle est l’experience la plus difficile que vous avez terminé dans l'espace?
7. Georgia: What cultural experiences have you shared with your fellow astronauts?
8. Celyn: Comment se passe un journee dans l'espace, quelle est votre horaire?
9. Caleb: What do you think would be a beneficial addition to the ISS?
10. Meghan W: Je sais sur l’ISS tu vous le soleil se lever et se coucher environ 16 fois par jour. Est-ce ea mélange tes habitudes de sommeil?
11. Georgia: How is Wi-Fi made available on the ISS and where does the signal come from?
12. Patrick: Quand est-ce que tu as appris à jouer la guitare et pourquoi est-ce que t apporté ta guitare en espace?
13. Faith: In the event of colonization of Mars how will dairy products be provided?
14. Mike: Dans l'espace, est-ce que tu peux voir la pollution? Est-ce qu’il y a un endroit qui est plus pollué que les autres?
15. Charlea: Would the smell or taste of food be different if it was grown in space?
16. Celyn: Est-ce que tu peux voir l’Aurores Boréalis?
17. Caleb: Can you feel jet lagged in space?
18. Pat: Est-ce que tu peux voir toutes les planètes dans l'espace?
19. Georgia: What personal items are you allowed to bring? Is there a maximum mass or volume?
20. Meghan W: Est-ce que tu vas en dehors de la station spatiale?
21. 7 MUR: Is there a difference in the resonance of your guitar or the sustain and sound of the strings in zero G as opposed to Earth?
22. Nicole: Comment est-ce que l’espace a influence ta vie quotidienne et tes valeurs et croyances?
23. Tammy, Nicole, and Rob: Si tu pouvais prendre quelqu'un avec toi, qui serait-il? Pourquoi?
ARISS is an international educational outreach program partnering the participating space agencies, NASA, Russian Space Agency, ESA, CNES, JAXA, and CSA, with the AMSAT and IARU organizations from participating countries.
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on ISS can energize youngsters' interest in science, technology and learning.
73
Gaston Bertels, ON4WF
ARISS Chairman
mercredi 20 mars 2013
PLANK dévoile le rayonnement de fond cosmologique hyperfréquence jeudi 21 mars 10h00 à l' ESA
20 mars 2013
Ce jeudi, les scientifiques dévoileront la meilleure image obtenue à ce jour
du rayonnement de fond cosmologique hyperfréquence (Cosmic Microwave Background
ou CMB) – le rayonnement fossile du Big Bang. Elle est basée sur les données du
télescope spatial Planck de l’ESA. Le lancement de Planck a eu lieu le 14 mai 2009 et la première image intégrale du ciel livrée par cette mission (voir ci-dessus), a été présentée en juillet 2010.
La ligne horizontale qui traverse l’image correspond au disque principal de notre galaxie, la Voie lactée. Les panaches qui s’étirent de part et d’autre sont des poussières froides contenant tout un réseau d’étoiles en formation.
En arrière-plan de la Voie lactée, on distingue en brun chiné le rayonnement de fond cosmologique hyperfréquence (CMB), la lumière la plus ancienne de notre Univers âgé de 13,7 milliards d’années. Cette lumière baigne l’Univers tout entier. C’est elle par exemple qui est à l’origine d’une petite partie des charges électrostatiques qui affectaient les postes de télévision analogiques.
Le CMB s’est imprimé sur le ciel alors que l’Univers n’avait que 380 000 ans. Pendant la phase d’expansion de l’Univers, le signal du CMB s’est étiré jusqu’à se transformer en hyperfréquences, ce qui correspond à une température de tout juste 2,7 degrés au-dessus du zéro absolu.
Les structures formant des mouchetures sur l’arrière-plan brun de l’image représentent d’infimes fluctuations de température qui correspondaient à des régions de densité légèrement différente au tout début de l’histoire de l’Univers. Elles portaient en elles le germe de toutes les structures qui se sont formées par la suite, ces étoiles et galaxies que nous connaissons aujourd’hui.
Cette carte permet aux astronomes d’en apprendre davantage sur la composition et l’évolution de l’Univers de sa naissance jusqu’à nos jours et même au-delà.
Le satellite COBE (COsmic Background Explorer), lancé en 1989 par la NASA, a été la première mission spatiale conçue pour étudier le CMB. Puis, en 2001, la NASA a lancé la WMAP (Wilkinson Microwave Anisotropy Probe), sonde de deuxième génération, qui a donné davantage de détails sur les fluctuations du CMB. Les cartes du CMB établies grâce à ces missions, qui apparaissent en noir et blanc sous l’image de Planck dans l’animation ci-dessus, montrent l’amélioration progressive de la précision avec laquelle a été cartographié le rayonnement fossile, vestige du Big Bang de notre Univers.
Planck vient désormais de révéler le rayonnement de fond cosmologique avec une précision encore plus grande en extrayant et en supprimant les émissions d’avant-plan qui le masquaient.
La nouvelle carte du CMB sera présentée et commentée lors d’une conférence de presse qui aura lieu ce jeudi à 10h00 au Siège de l’ESA. L’événement sera retransmis en direct sur www.esa.int.
Articles ESA :
http://www.esa.int/Our_Activities/Space_Science/Planck
21 mars 2013
Cosmic
microwave background seen by Planck
21 March 2013
Acquired by ESA’s Planck
space telescope, the most detailed map ever created of the cosmic microwave
background – the relic radiation from the Big Bang – was released today
revealing the existence of features that challenge the foundations of our current
understanding of the Universe. The image is based on the initial 15.5 months of data from Planck and is the mission’s first all-sky picture of the oldest light in our Universe, imprinted on the sky when it was just 380 000 years old...........
Traduction :
ESA > ESA in your country > France
ARTICLE :
http://www.esa.int/fre/ESA_in_your_country/France/Planck_revele_un_Univers_presque_parfait
Rayonnement de fond cosmologique hyperfréquence détecté par Planck
21 mars 2013
Le télescope spatial Planck de l'Agence spatiale européenne est à
l’origine des données qui permettent aujourd’hui la diffusion de la
carte la plus détaillée encore jamais établie du rayonnement de fond
cosmologique hyperfréquence – le rayonnement fossile du Big Bang. Cette
carte met en évidence des caractéristiques cosmiques remarquables qui
bousculent les fondements de nos connaissances actuelles sur l’Univers.
Cette image est basée sur les données des 15 premiers mois de fonctionnement de Planck. C’est la première image de cette mission qui montre sur l’ensemble du ciel la plus ancienne des émissions de lumière, qui a baigné notre jeune Univers quand il n’avait que 380 000 ans.
L’Univers était alors rempli d’un magma brûlant de protons, d’électrons et de photons s’entremêlant à quelque 2700ºC. L’interaction entre protons et électrons qui a donné naissance aux atomes d’hydrogène a ensuite libéré la lumière. A la faveur de l’expansion de l’Univers, cette lumière a été étirée jusqu’à atteindre aujourd’hui des longueurs d’ondes hyperfréquences qui équivalent à une température de juste 2,7 degrés au-dessus du zéro absolu.
Ce rayonnement de fond cosmologique hyperfréquence – CMB – présente d’infimes fluctuations de température qui correspondent à des régions de densité légèrement différente aux époques proches de l’origine et portent en elles le germe de toutes les structures futures, ces étoiles et galaxies que nous connaissons aujourd’hui.
Selon le modèle cosmologique standard, ces fluctuations se sont produites immédiatement après le Big Bang et ont été étirées sur de grandes échelles cosmologiques au cours d’une brève période d’expansion accélérée dite inflation.
Planck a été conçu pour cartographier ces fluctuations sur l’intégralité du ciel avec une résolution et une sensibilité encore jamais atteintes. En analysant la nature et la répartition des germes de structures sur l’image du CMB obtenue grâce à Planck, nous pouvons déterminer la composition et l’évolution de l’Univers de sa naissance jusqu’au jour d’aujourd’hui.
Cette image est basée sur les données des 15 premiers mois de fonctionnement de Planck. C’est la première image de cette mission qui montre sur l’ensemble du ciel la plus ancienne des émissions de lumière, qui a baigné notre jeune Univers quand il n’avait que 380 000 ans.
L’Univers était alors rempli d’un magma brûlant de protons, d’électrons et de photons s’entremêlant à quelque 2700ºC. L’interaction entre protons et électrons qui a donné naissance aux atomes d’hydrogène a ensuite libéré la lumière. A la faveur de l’expansion de l’Univers, cette lumière a été étirée jusqu’à atteindre aujourd’hui des longueurs d’ondes hyperfréquences qui équivalent à une température de juste 2,7 degrés au-dessus du zéro absolu.
Ce rayonnement de fond cosmologique hyperfréquence – CMB – présente d’infimes fluctuations de température qui correspondent à des régions de densité légèrement différente aux époques proches de l’origine et portent en elles le germe de toutes les structures futures, ces étoiles et galaxies que nous connaissons aujourd’hui.
Selon le modèle cosmologique standard, ces fluctuations se sont produites immédiatement après le Big Bang et ont été étirées sur de grandes échelles cosmologiques au cours d’une brève période d’expansion accélérée dite inflation.
Planck a été conçu pour cartographier ces fluctuations sur l’intégralité du ciel avec une résolution et une sensibilité encore jamais atteintes. En analysant la nature et la répartition des germes de structures sur l’image du CMB obtenue grâce à Planck, nous pouvons déterminer la composition et l’évolution de l’Univers de sa naissance jusqu’au jour d’aujourd’hui.
Planck’s anomalous sky
Mais la carte de Planck est si précise qu’elle fait également apparaître certaines caractéristiques énigmatiques qui ne pourront être expliquées que par de nouvelles avancées théoriques.
“La qualité extraordinaire du tableau de l’Univers juvénile que nous brosse Planck nous permet de mettre à nu jusqu’à ses fondements sous les différentes strates du temps et met en évidence que notre représentation du cosmos est loin d’être complète. Et c’est l'industrie européenne qui a rendu ces découvertes possibles en développant à cet effet des technologies sans équivalent,” déclare Jean-Jacques Dordain, Directeur général de l’ESA.
“Depuis la diffusion en 2010 du premier relevé de l’ensemble du ciel acquis par Planck, nous avons soigneusement extrait et analysé toutes les émissions lumineuses d’avant-plan qui se situent entre nous et la lumière originelle émise par l’Univers, ce qui nous a permis de faire apparaître le rayonnement de fond cosmologique hyperfréquence avec une précision encore jamais atteinte,” ajoute George Efstathiou de l’Université de Cambridge (Royaume-Uni).
L’une des constatations les plus surprenantes est que sur de grandes échelles angulaires, les fluctuations des températures du CMB ne correspondent pas à celles que prévoit le modèle standard – leur signal n’est pas aussi fort que le laisserait prévoir la structure à plus petite échelle que Planck a mise en évidence.
Masquer suite
Asymmetry and cold spot
En outre, la tache froide repérée sur une partie du ciel est bien plus étendue qu’on ne l’escomptait.
Cette asymétrie et cette tache froide avaient déjà été décelées par le prédécesseur de Planck, le satellite WMAP de la NASA, mais elles ont été peu étudiées, certains spécialistes doutant qu’elles aient une origine cosmique.
“La détection de ces anomalies par Planck est suffisamment significative pour écarter tous les doutes qui auraient pu subsister quant à leur réalité. Impossible désormais d’avancer qu’il pourrait s’agir d’un biais introduit par les instruments eux-mêmes. Elles sont bien réelles et il nous faut maintenant leur trouver une explication crédible,” indique Paolo Natoli de l’Université de Ferrara (Italie).
“Imaginez que l’examen des fondations d’un bâtiment fasse apparaître des fragilités à certains endroits. Même sans avoir la certitude que le bâtiment soit à terme menacé d’effondrement, vous allez sans doute rechercher sans tarder le moyen de le consolider,” ajoute François Bouchet de l’Institut d’Astrophysique de Paris.
L’une des hypothèses que l’on peut avancer est que l’Univers n’est pas homogène dans toutes les directions à une échelle supérieure à celle sur laquelle portent nos observations. Dans ce scénario, la lumière du rayonnement fossile pourrait avoir suivi à travers l’Univers un cheminement plus complexe qu’on ne le pensait jusqu’ici, qui aurait donné naissance à certaines des structures inhabituelles que nous observons aujourd’hui.
“Notre but ultime est de construire un nouveau modèle qui prédise ces anomalies et explique les liens qu’elles entretiennent. Mais nous n’en sommes qu’aux prémices. Nous ne savons pas encore si cela est possible et quels sont les nouveaux postulats de la physique dont nous avons besoin. C’est cela qui est passionnant,” s’enthousiasme George Efstathiou.
La matière ordinaire qui constitue les étoiles et les galaxies représente seulement 4,9 % de la masse/densité énergétique de l’Univers. La matière noire, dont l’existence n’a jusqu’ici été mise en évidence qu’indirectement, à travers l’influence gravitationnelle qu’elle exerce, en constitue 26,8%, soit près d’un cinquième de plus que ce que l’on estimait précédemment.
Inversement, l’énergie noire, force mystérieuse que l’on croit être à l’origine de l’accélération de l’expansion de l’Univers, représente une proportion moindre que ce que l’on pensait auparavant.
Enfin, les données de Planck ont conduit à réviser le taux d’expansion actuel de l’Univers, dit constante de Hubble, pour le fixer à 67,15 km/s/Mpc, ce qui est notablement inférieur à la valeur servant actuellement de référence en astronomie. Il en résulte que l’âge de l’Univers serait de 13,82 milliards d’années.
“En nous permettant d’établir les cartes du rayonnement hyperfréquence les plus précises et les plus détaillées jamais réalisées à ce jour, Planck nous donne une nouvelle vision de l’Univers qui nous fait toucher du doigt les limites des théories cosmologiques actuelles, ” explique Jan Tauber, responsable scientifique du projet Planck à l’ESA.
“Nous observons une correspondance presque parfaite avec le modèle cosmologique standard mais certains traits énigmatiques nous contraignent à reconsidérer quelques-unes de nos hypothèses de base.”
“C’est le début d’une nouvelle aventure et nous comptons bien résoudre une partie de l’énigme en poursuivant l’analyse des données de Planck.”
25 mars 2013
Des scientifiques ont réalisé une nouvelle carte de la lumière
originelle de l'univers, une carte qui soulève des questions de fond sur
le Big Bang.
"L'idée derrière Planck, c'était de réaliser la meilleure cartographie possible du rayonnement thermique issu du Big Bang", explique Bruce Partridge, professeur d'astronomie au Haverford College. Et cette cartographie, la plus précise qui soit, renferme des informations scientifiques auxquelles personne ne s'attendait.
"Cette carte est très spéciale: elle représente le rayonnement de fond cosmologique hyperfréquence, réalisée grâce au satellite Planck. Elle recoupe tout le travail que nous avons accompli ces dernières années" dit Jan Tauber, un scientifique du projet Planck de l'ESA, en montrant une carte arrondie aux couleurs oranges et bleu.
Le rayonnement de fond cosmologique hyperfréquence, c'est le rayonnement lumineux ou thermique, émis 380.000 ans après le Big Bang. Le rayonnement était alors intimement lié à la matière. C'est pourquoi le représenter sous forme de carte permet de mieux comprendre la structure de l'univers primordial.
Cette carte confirme certaines connaissances, met en remet certaines en cause: "La majeure partie de cette carte colle parfaitement à notre modèle basique. Mais nous avons aussi détecté des éléments surprenants, et c'est là que cela devient intéressant, car il y a des éléments qui ne collent pas, ajoute Jan Tauber. Par exemple, à un endroit de la carte, on peut voir ce que l'on appelle un point froid, c'est à dire une vaste zone dans le ciel où nous observons un déficit de signal. Nous nous attendions à voir plus de signaux ici, mais ce n'est pas le cas. C'est clairement une anomalie".
"L'idée derrière Planck, c'était de réaliser la meilleure cartographie possible du rayonnement thermique issu du Big Bang", explique Bruce Partridge, professeur d'astronomie au Haverford College. Et cette cartographie, la plus précise qui soit, renferme des informations scientifiques auxquelles personne ne s'attendait.
"Cette carte est très spéciale: elle représente le rayonnement de fond cosmologique hyperfréquence, réalisée grâce au satellite Planck. Elle recoupe tout le travail que nous avons accompli ces dernières années" dit Jan Tauber, un scientifique du projet Planck de l'ESA, en montrant une carte arrondie aux couleurs oranges et bleu.
Le rayonnement de fond cosmologique hyperfréquence, c'est le rayonnement lumineux ou thermique, émis 380.000 ans après le Big Bang. Le rayonnement était alors intimement lié à la matière. C'est pourquoi le représenter sous forme de carte permet de mieux comprendre la structure de l'univers primordial.
Cette carte confirme certaines connaissances, met en remet certaines en cause: "La majeure partie de cette carte colle parfaitement à notre modèle basique. Mais nous avons aussi détecté des éléments surprenants, et c'est là que cela devient intéressant, car il y a des éléments qui ne collent pas, ajoute Jan Tauber. Par exemple, à un endroit de la carte, on peut voir ce que l'on appelle un point froid, c'est à dire une vaste zone dans le ciel où nous observons un déficit de signal. Nous nous attendions à voir plus de signaux ici, mais ce n'est pas le cas. C'est clairement une anomalie".
Planck est une mission de l'Agence Spatiale Européenne, qui intéresse
les scientifiques du monde entier, notamment aux Etats-Unis. Le
professeur Bruce Partridge était parmi les premiers contributeurs au
projet. Il savait que les informations issues de cette mission
livreraient des détails sans précédent sur le Big Bang et ses
implications. Selon ce professeur d'astronomie au Haverford College,
"Planck est la première étude du ciel avec une gamme d'ondes
électromagnétiques difficiles à observer depuis la surface terrestre.
A partir d'une fréquence d'à peu près 100 Giga Hertz, qui correspond à des ondes électromagnétiques de quelques millimètres, et qui montent jusqu'à des fréquences multipliées par dix, Planck est le premier instrument qui pratique des relevés sur la totalité du ciel quelque soit la sensibilité. Rappelez-vous des avancées qu'ont connues les appareils photos, quand ils sont passés de quelques mega-pixels à six, huit, puis douze mega-pixels. En gros, Planck fait le même bond en avant: des résolutions bien plus élevées et une plus forte sensibilité pour cartographier cette surface."
Malgré cette haute résolution, les scientifiques devaient s'assurer de ne pas capter de mauvaises interférences issues d'objets bien plus proches de la terre. Car notre galaxie elle-même émet un rayonnement thermique, qui peut biaiser ou imiter la chaleur issue du Big Bang. Planck a donc été conçu de façon à isoler les signaux cosmologiques issus du Big Bang.
A partir d'une fréquence d'à peu près 100 Giga Hertz, qui correspond à des ondes électromagnétiques de quelques millimètres, et qui montent jusqu'à des fréquences multipliées par dix, Planck est le premier instrument qui pratique des relevés sur la totalité du ciel quelque soit la sensibilité. Rappelez-vous des avancées qu'ont connues les appareils photos, quand ils sont passés de quelques mega-pixels à six, huit, puis douze mega-pixels. En gros, Planck fait le même bond en avant: des résolutions bien plus élevées et une plus forte sensibilité pour cartographier cette surface."
Malgré cette haute résolution, les scientifiques devaient s'assurer de ne pas capter de mauvaises interférences issues d'objets bien plus proches de la terre. Car notre galaxie elle-même émet un rayonnement thermique, qui peut biaiser ou imiter la chaleur issue du Big Bang. Planck a donc été conçu de façon à isoler les signaux cosmologiques issus du Big Bang.
Masquer suite
La mission Planck pourrait conduire à remettre en question nos théories
sur les origines de l'univers. La difficulté, c'est qu'à grande échelle,
le signal issu du rayonnement de fond cosmologique hyperfréquence est
bien plus faible que prévu. "Sommes-nous capables de trouver une
explication théorique qui ferait le lien entre les différents phénomènes
observés, y compris les petites contradictions, avec la théorie de
l'inflation? C'est possible que nous devions changer de paradigme, parce
que pour le moment, aucune explication théorique claire n'est capable
de faire le lien entre ces anomalies. Mais si on parvient à trouver une
théorie qui fait le lien entre des phénomènes jusque là sans aucun
rapport, alors on construit une nouvelle physique", explique le
professeur d'astrophysique George Efstathiou à l'université de
Cambridge.
Cette mission va vraisemblablement apporter un éclairage nouveau sur la transformation de l'univers de sa naissance à aujourd'hui et sur son évolution future. "Quel âge a l'univers? Est-il vraiment en expansion? Cela a-t-il commencé avec le Big Bang? Grâce à ces observations, on trouve des réponses à ces questions. Oui, ça a commencé avec le Big Bang. Nous savons quand il s'est produit: il y a 13,7 milliards d'années, pas 14, pas 15, mais 13,7 milliards d'années. Ce sont des réponses basées sur des observations" s'émerveille le professeur Bruce Partridge.
Lire l' article :
http://www.esa.int/fre/ESA_in_your_country/France/Le_satellite_europeen_Planck_remonte_jusqu_a_la_nuit_des_temps
Cette mission va vraisemblablement apporter un éclairage nouveau sur la transformation de l'univers de sa naissance à aujourd'hui et sur son évolution future. "Quel âge a l'univers? Est-il vraiment en expansion? Cela a-t-il commencé avec le Big Bang? Grâce à ces observations, on trouve des réponses à ces questions. Oui, ça a commencé avec le Big Bang. Nous savons quand il s'est produit: il y a 13,7 milliards d'années, pas 14, pas 15, mais 13,7 milliards d'années. Ce sont des réponses basées sur des observations" s'émerveille le professeur Bruce Partridge.
Lire l' article :
http://www.esa.int/fre/ESA_in_your_country/France/Le_satellite_europeen_Planck_remonte_jusqu_a_la_nuit_des_temps
Source : ESA
Contact : f6agv (AT) free.fr
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