Extravehicular Activity (EVA) 2 on Flight Day 5 to service the Hubble Space Telescope on this second servicing mission (HST SM-02). Extravehicular Mobility Unit (EMU) suited astronauts Greg Harbaugh and Joe Tanner replace the Fine Guidance Sensor 1 (FGS-1) on the telescope, -V2 location. Tanner (identified by the diagonal red stripes) stands on the Remote Manipulator System (RMS) Manipulator Foot Restraint (MFR) and pulls the original FGS out of the telescope bay while Harbaugh (broken red stripes) watches the clearance for the orbital replacement unit (ORU) (001-3). Tanner holds the bulky FGS ORU and moves it down towards the ORU carrier (ORUC) aft fixture (004-6). Silhouette views of the telescope over Australia with the FGS on the aft fixture (007-12, 016-18). Wide shots of the telescope and EVA activity; Tanner stands on MFR and Harbaugh can barely be seen down next to the aft fixure (013-15).
