Hubble SM4 EVA

Astronaut Andrew Feustel (left), STS-125 mission specialist, navigates near the Hubble Space Telescope on the end of the Remote Manipulator System robotic arm, controlled from inside Atlantis' crew cabin. Astronaut John Grunsfeld signals to his crewmate from just a few feet away. Astronauts Feustel and Grunsfeld were continuing servicing work on the giant observatory, locked down in the cargo bay of the shuttle.