STS-125 has been delayed until at least May 2009 to prepare a second data handling unit replacement for the telescope. The current target date is May 12th. STS-125 will be the fifth and final servicing mission to the Hubble Space Telescope. The mission will be flown by Space Shuttle Atlantis.Atlantis will carry two new instruments to the HST, in addition to a replacement Fine Guidance Sensor, six new gyroscopes and batteries to allow the telescope to continue to function at least through 2013. The crew will also install a new thermal blanket layer to provide improved insulation, and a "Soft-Capture mechanism" to aid in the safe de-orbiting of the spacecraft by an unmanned spacecraft at the end of its operational lifespan.Otherwise known as Hubble Space Telescope Servicing Mission 4 (HST-SM4), the mission will mark the thirtieth flight of Space Shuttle Atlantis, the last planned manned mission to the space telescope, and the final flight of a Space Shuttle not related to the assembly of the International Space Station.
Mission name STS-125
Space Shuttle Atlantis
Launch pad LC-39A
Launch date May 12th, 2009. Launch Window: 60 minutes