Megan McArthur was a member of the STS-125 mission to service the Hubble Space Telescope. McArthur was the ascent and entry flight engineer and was the lead STS-125 (May 11 through May 24, 2009). This was the fifth and final Hubble Space Telescope servicing mission. McArthur worked as the flight engineer during launch, rendezvous with the telescope, and landing. She also carefully retrieved the telescope, using the shuttle’s robotic arm, and placed it in the shuttle’s cargo bay. The 19-year-old telescope then spent six days undergoing an overhaul during 5 days of spacewalks. The spacewalkers were supported by McArthur operating the robotic arm. The team overcame frozen bolts, stripped screws, and stuck handrails. The refurbished Hubble Telescope then had four new or rejuvenated scientific instruments, new batteries, new gyroscopes, and a new computer. The STS-125 mission was accomplished in 12 days, 21 hours, 37 minutes and 9 seconds, traveling 5,276,000 miles in 197 Earth orbits.