A NASA spacecraft, launched on 15 October 1989 from the shuttle Atlantis on an international deep-space mission, that passed and photographed Venus on 9 February 1990, for a gravity assist. On its journey through the asteroid belt, Galileo encountered Gaspra on 29 October 1991, and Ida on 28 August 1993, where it discovered the satellite Dactyl. It reached Jupiter in December 1995, then entered an orbit that brought it into repeated encounters with the Galilean satellites. The spacecraft comprises an orbiter and a probe, released in July 1995, as Galileo was still approaching Jupiter, which penetrated the atmosphere and returned data for 61.4 minutes, by which time it had descended to a level where the pressure was 24 bars, 140 km below the 1 bar pressure altitude.
Subjects: Earth Sciences and Geography.