Astronaut Andrew Feustel, on the shuttle's robotic arm, moves the Corrective Optics Space Telescope Axial Replacement or COSTAR to a temporary storage location in the payload bay of Atlantis as fellow spacewalker John Grunsfeld works inside the Hubble Space Telescope in this image from NASA TV May 16, 2009. The spacewalkers are focused on the installation of the telescope's new Cosmic Origins Spectrograph which will replace COSTAR inside the telescope. [Agencies]