The STS-34 crew of five launched aboard the Space Shuttle Orbiter Atlantis on October 18, 1989 at 12:53:40pm (EDT). Crew members included commander Donald E. Williams, pilot Michael J. McCulley, and mission Specialists Shannon W. Lucid, Franklin R. Chang-Diaz, and Ellen S. Baker. The primary payload was the Galileo Jupiter Spacecraft and attached Inertial Upper Stage (IUS). Deployed 6 hours and 30 minutes into the flight, the IUS stages fired boosting Galileo on trajectory for a 6 year trip to Jupiter.