CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Michael Good stands while cool air is pumped through his launch-and-entry suit. He is preparing to enter space shuttle Atlantis through the open hatch in the background. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Michael Good is helped by the closeout crew putting on his harness, which includes a parachute pack, before crawling through the open hatch into space shuttle Atlantis. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Andrew Feustel is helped by the closeout crew putting on his harness, which includes a parachute pack, before crawling through the open hatch into space shuttle Atlantis. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, Mission Specialist Andrew Feustel, left, is helped by the closeout crew putting on his harness, which includes a parachute pack. At right is Pilot Gregory C. Johnson. They are preparing to enter space shuttle Atlantis through the open hatch in the background. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Michael Good is helped by the closeout crew putting on his harness, which includes a parachute pack, before crawling through the open hatch into space shuttle Atlantis. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Mike Massimino, left, is next in line to complete preparation of his launch-and-entry suit for launch. At right, Mission Specialist Michael Good is helped with his harness, which includes a parachute pack, before crawling through the open hatch into space shuttle Atlantis. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Commander Scott Altman is helped by the closeout crew putting on his harness, which includes a parachute pack, before crawling through the open hatch into space shuttle Atlantis. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Michael Good prepares to enter space shuttle Atlantis for launch. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Pilot Gregory C. Johnson is helped by the closeout crew putting on his harness, which includes a parachute pack, before crawling through the open hatch into space shuttle Atlantis. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell

CAPE CANAVERAL, Fla. – In the White Room on Launch Pad 39A at NASA's Kennedy Space Center in Florida, STS-125 Mission Specialist Megan McArthur completes preparation of her launch-and-entry suit for entry into space shuttle Atlantis. The White Room is at the end of the orbiter access arm on the fixed service structure and provides access into the shuttle. Atlantis' 11-day flight will include five spacewalks to refurbish and upgrade the telescope with state-of-the-art science instruments that will expand Hubble's capabilities and extend its operational lifespan through at least 2014. The payload includes a Wide Field Camera 3, fine guidance sensor and the Cosmic Origins Spectrograph. Launch of Atlantis on the STS-125 mission is scheduled for 2:01 p.m. May 11 EDT. Photo credit: NASA/Sandra Joseph-Kevin O'Connell