HOUSTON, May 17 (RIA Novosti) - Two astronauts have made a third spacewalk to complete repairs of the Hubble Space Telescope, NASA reported.
Astronauts John Grunsfeld and Andrew Feustel spent 6 hours and 36 minutes on Saturday outside the shuttle Atlantis to upgrade the space laboratory for another five to ten years, NASA said.
The spacewalkers focused on the installation of the telescope's new spectrograph expected to provide greater insight into how planets, stars and galaxies are formed, NASA said.
The Atlantis space shuttle with seven astronauts on its board took off from Cape Canaveral on May 11. The STS-125 eleven-day mission, the final shuttle flight to NASA's Hubble Space Telescope, is intended to enhance the observatory and ensure cutting-edge science.
A total of five spacewalks are planned to install new instruments and thermal blankets, repair two existing instruments, refurbish subsystems and replace gyroscopes, batteries and a unit that stores and transmits science data to Earth, NASA said.
