Before revision: General Purpose Heat Source (GPHS) applications The Galileo spacecraft launched on October 18, 1989, the Ulysses on October 6, 1990, the Cassini on October 15, 1997 and the New Horizons on January 19, 2006.
After revision: ,General Purpose Heat Source (GPHS) applications The Galileo spacecraft launched on October 18, 1989, the Ulysses on October 6, 1990, the Cassini on October 15, 1997 and the New Horizons on January 19, 2006.