Explosión cósmica de hace millones de años

Fotos de la NASA

This image provided by NASA shows the crew of STS-125 posing for a photo on the 225-foot level of the fixed service structure at Launch Pad 39A after taking part in a simulated launch countdown at NASA's Kennedy Space Center in Florida Wednesday Sept. 24, 2008. NASA is delaying next month's shuttle launch to the Hubble Space Telescope. Space shuttle Atlantis is now set to blast off late at night on Oct. 14. Liftoff had been scheduled for the wee hours of Oct. 10. Atlantis' seven astronauts lost a week of training because of Hurricane Ike. The hurricane shut down the Johnson Space Center in Houston, which did not reopen until this week. From left are Mission Specialists John Grunsfeld and Michael Good, Pilot Gregory C. Johnson, Commander Scott Altman, and Mission Specialists Mike Massimino, Andrew Feustel and Megan McArthur. Behind them are space shuttle AtlantisÃâ external fuel tank and one of the twin solid rocket boosters. (AP Photo/NASA)

AP

In this graphic illustration released by NASA to Reuters September 23, 2008, the heliosphere that is created by solar winds is depicted as a bubble surrounding the solar system. Measurements from the spacecraft Ulysses show the wind's pressure has dropped 20 percent since the mid-1990s. As the solar wind weakens, the heliosphere is expected to dwindle in size and strength as well, allowing more cosmic radiation -- super high-energy electrons and protons zipping through interstellar space -- to reach the inner solar system. REUTERS/NASA/Goddard Space Flight Center Conceptual Image Lab/Handout (UNITED STATES). FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.

Reuters

In this graphic illustration released by NASA to Reuters September 23, 2008, the heliosphere that is created by solar winds is depicted as a bubble surrounding the solar system. Measurements from the spacecraft Ulysses show the wind's pressure has dropped 20 percent since the mid-1990s. As the solar wind weakens, the heliosphere is expected to dwindle in size and strength as well, allowing more cosmic radiation -- super high-energy electrons and protons zipping through interstellar space -- to reach the inner solar system. REUTERS/NASA/Feimer/Handout (UNITED STATES). FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS.

Reuters

In this image released by NASA, the space shuttle Atlantis stands on pad 39A (bottom) and space shuttle Endeavour stands on pad 39B September 20, 2008 as Atlantis is prepared for launch at the Kennedy Space Center in Cape Canaveral, Florida. Atlantis is scheduled for an October 10, 2008 launch to service the Hubble Space Telescope. Discovery has been rolled out in case Atlantis suffers serious damage and her crew needs rescue. NASA estimates that in a wort-case scenario astronauts could stay alive in the shuttle for 25 days. The International Space Station is not a recue option because it is too far away from the telescope. AFP PHOTO/NASA = GETTY OUT = (Photo credit should read -/AFP/Getty Images)

AFP/Getty Images

In this image released by NASA, the space shuttle Atlantis stands on pad 39A (bottom) and space shuttle Endeavour stands on pad 39B September 20, 2008 as Atlantis is prepared for launch at the Kennedy Space Center in Cape Canaveral, Florida. Atlantis is scheduled for an October 10, 2008 launch to service the Hubble Space Telescope. Discovery has been rolled out in case Atlantis suffers serious damage and her crew needs rescue. NASA estimates that in a wort-case scenario astronauts could stay alive in the shuttle for 25 days. The International Space Station is not a recue option because it is too far away from the telescope. AFP PHOTO/NASA = GETTY OUT = (Photo credit should read -/AFP/Getty Images)

AFP/Getty Images

The space shuttle Atlantis (foreground) sits on Launch Pad A and the space shuttle Endeavour on Launch Pad B (above) at the Kennedy Space Center in Cape Canaveral, Florida September 20, 2008. For the first time since July 2001, two shuttles are on the launch pads at the same time. Endeavour will stand by at pad B in the event a rescue mission is necessary during space shuttle AtlantisÃâ upcoming mission to repair NASAÃâs Hubble Space Telescope, targeted to launch October 10. REUTERS/NASA/Handout (UNITED STATES)

Reuters

Space shuttle Atlantis stands on pad 39A (L) and space shuttle Endeavour stands on pad 39B September 20, 2008 as Atlantis is prepared for launch at the Kennedy Space Center in Cape Canaveral, Florida. Atlantis is scheduled for an October 10, 2008 launch to service the Hubble Space Telescope. Discovery has been rolled out in case Atlantis suffers serious damage and her crew needs rescue. NASA estimates that in a wort-case scenario astronauts could stay alive in the shuttle for 25 days. The International Space Station is not a recue option because it is too far away from the telescope. AFP PHOTO/BRUCE WEAVER (Photo credit should read BRUCE WEAVER/AFP/Getty Images)

AFP/Getty Images

Space shuttle Atlantis stands on pad 39A (L) and space shuttle Endeavour stands on pad 39B September 20, 2008 as Atlantis is prepared for launch at the Kennedy Space Center in Cape Canaveral, Florida. Atlantis is scheduled for an October 10, 2008 launch to service the Hubble Space Telescope. Discovery has been rolled out in case Atlantis suffers serious damage and her crew needs rescue. NASA estimates that in a wort-case scenario astronauts could stay alive in the shuttle for 25 days. The International Space Station is not a recue option because it is too far away from the telescope. AFP PHOTO/BRUCE WEAVER (Photo credit should read BRUCE WEAVER/AFP/Getty Images)

AFP/Getty Images

Space shuttle Atlantis stands on pad 39A (L) and space shuttle Endeavour stands on pad 39B September 20, 2008 as Atlantis is prepared for launch at the Kennedy Space Center in Cape Canaveral, Florida. Atlantis is scheduled for an October 10, 2008 launch to service the Hubble Space Telescope. Discovery has been rolled out in case Atlantis suffers serious damage and her crew needs rescue. NASA estimates that in a wort-case scenario astronauts could stay alive in the shuttle for 25 days. The International Space Station is not a recue option because it is too far away from the telescope. AFP PHOTO/BRUCE WEAVER (Photo credit should read BRUCE WEAVER/AFP/Getty Images)

AFP/Getty Images

Space shuttle Atlantis stands on pad 39A (L) and space shuttle Endeavour stands on pad 39B September 20, 2008 as Atlantis is prepared for launch at the Kennedy Space Center in Cape Canaveral, Florida. Atlantis is scheduled for an October 10, 2008 launch to service the Hubble Space Telescope. Discovery has been rolled out in case Atlantis suffers serious damage and her crew needs rescue. NASA estimates that in a wort-case scenario astronauts could stay alive in the shuttle for 25 days. The International Space Station is not a recue option because it is too far away from the telescope. AFP PHOTO/BRUCE WEAVER (Photo credit should read BRUCE WEAVER/AFP/Getty Images)

AFP/Getty Images