JSC2009-E-121339 (21 May 2009) --- The astronaut crewmembers of the STS-125 flight orbiting Earth aboard the Space Shuttle Atlantis are seen on a TV screen as they receive a phone call from U.S. Senator Barbara Mikulski (D-Md.) the day after the crew released the freshly serviced Hubble Space Telescope. Photo credit: NASA/Paul Alers

Mike Klenlen, the Hubble Deputy Project Manager, speaks during a press conference on the upcoming Hubble Space Telescope servicing mission, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)

Ed Weiler, Associate Administrator, Science Mission Directorate at NASA Headquarters, seated second from left, speaks during a press conference on the upcoming Hubble Space Telescope servicing mission as David Leckrone, Hubble Project Scientist, Preston Burch and Mike Klenlen, seated right, look on, Thursday, April 23, 2009, at NASA Headquarters in Washington. J.D. Harrington, Public Affairs officer for the Science Mission Directorate looks on at left. Photo Credit: (NASA/Paul. E. Alers)

Ed Weiler, Associate Administrator, Science Mission Directorate at NASA Headquarters, left, looks on at David Leckrone, Hubble Project Scientist, as he speaks during a press conference on the upcoming Hubble Space Telescope servicing mission while Preston Burch and Mike Klenlen, seated right, look on, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, waves to the crew of STS-125, at the end of a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, speaks to the crew of STS-125, during a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington as Sen. Bill Nelson, D-Fla., rear left, looks on. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, speaks to the crew of STS-125, during a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

Ed Weiler, Associate Administrator, Science Mission Directorate at NASA Headquarters, second from left, speaks during a press conference on the upcoming Hubble Space Telescope servicing mission as David Leckrone, Hubble Project Scientist, Preston Burch and Mike Klenlen, seated right, look on, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, speaks to the crew of STS-125, during a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, along with Sen. Bill Nelson, D-Fla., rear left, speak to the crew of STS-125, during a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, speaks to the crew of STS-125, during a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, speaks to the crew of STS-125, during a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

U.S. Sen. Barbara Mikulski, D-Md., rear right, and Sen. Bill Nelson, rear left, speak to the crew of STS-125, during a televised phone call to the space shuttle, Thursday, May 21, 2009, in a Dirksen Senate office building hearing room on Capitol Hill in Washington. The crew of STS-125 is returning to earth after finishing repairs on the Hubble Space Telescope. Photo Credit: (NASA/Paul E. Alers)

David Leckrone, Hubble Project Scientist at NASA's Goddard Space Flight Center speaks during a press conference on the upcoming Hubble Space Telescope servicing mission, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)

Preston Burch, Hubble Program Manager, speaks during a press conference on the upcoming Hubble Space Telescope servicing mission, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)

JSC2009-E-121340 (21 May 2009) --- The astronaut crewmembers of the STS-125 flight orbiting Earth aboard the Space Shuttle Atlantis are seen on a TV screen as they receive a phone call from U.S. Senator Barbara Mikulski (D-Md.) the day after the crew released the freshly serviced Hubble Space Telescope. Photo credit: NASA/Paul Alers

Ed Weiler, Associate Administrator, Science Mission Directorate at NASA Headquarters, makes a point during a press conference on the upcoming Hubble Space Telescope servicing mission, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)

David Leckrone, Hubble Project Scientist at Goddard Space Flight Center, speaks during a press conference on the upcoming Hubble Space Telescope servicing mission, Thursday, April 23, 2009, at NASA Headquarters in Washington. Photo Credit: (NASA/Paul. E. Alers)