S90-45985 (May 1990) --- The Ulysses spacecraft undergoes testing at the vacuum spin-balancing facility in ESTEC. Careful balancing is required in order to ensure that the high gain antenna, which is aligned with the spacecraft spin axis, can be accurately pointed toward Earth throughout the mission. It will be flown to Kennedy Space Center (KSC) for further processing before being on loaded to Discovery's cargo bay. The Space Shuttle crew of STS-41 will send it off to its long-awaited mission.