#Ulysses space probe generator#
The probe was powered instead by a radioisotope thermoelectric generator (RTG). To reach the desired orbit around the Sun, the mission's planners chose a gravity assist maneuver around Jupiter, but this Jupiter encounter meant that Ulysses could not be powered by solar cells. To change the orbital inclination of a spacecraft to about 80° requires a large change in heliocentric velocity, the energy to achieve which far exceeded the capabilities of any launch vehicle.
To study the Sun at all latitudes, the probe needed to change its orbital inclination and leave the plane of the Solar System. The last day for mission operations on Ulysses was 30 June 2009. Ulysses was a joint venture of the European Space Agency (ESA) and the United States' National Aeronautics and Space Administration (NASA), under leadership of ESA with participation from Canada's National Research Council. In addition, the probe studied several comets. Ulysses ( / j uː ˈ l ɪ s iː z/ yoo- LISS-eez, UK also / ˈ j uː l ɪ s iː z/ YOO-liss-eez) was a robotic space probe whose primary mission was to orbit the Sun and study it at all latitudes. Space Shuttle Discovery ( STS-41) with Inertial Upper Stage and PAM-S
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