|Schematic Image of the Sun and its Environment|
Ulysses, decommissioned on June 30, 2009, was a joint robotic space probe to study the Sun by NASA and the European Space Agency (ESA). The launch of Ulysses was delayed until October 6, 1990 aboard Discovery (mission STS-41) due to the loss of its initially assigned carrier Challenger. It studied the Sun at all latitudes, breaking the limitation that the Sun had been only observed from low solar latitudes due to the Earth's orbit confined on the ecliptic plane. The mission was managed by JPL.