The telescope
SM3A: Installation of the Fine Guidance Sensor (FGS)
December 16, 1999 · ESA/Hubble · HST , Hubble Space Telescope , SM3A
Astronauts C. Michael Foale, left, and Claude Nicollier (on Discovery's robotic arm) install a Fine Guidance Sensor (FGS) into a protective enclosure in the Shuttle's payload bay.