STS-125 was a Space Shuttle mission to the Hubble Space Telescope (HST) flown by Space Shuttle Atlantis. The mission launched on May 11, 2009, and was the final servicing mission to the HST. The primary objective of the mission was to repair and upgrade the HST to extend its operational life and improve its capabilities. The mission also included the delivery of supplies and equipment to the HST and the rotation of the crew of the HST.