Ulysses (, ) is a decommissioned robotic space probe whose primary mission was to orbit the Sun and study it at all latitudes. It was launched in 1990 and made three "fast latitude scans" of the Sun in 1994/1995, 2000/2001, and 2007/2008. In addition, the probe studied several comets. "Ulysses" was a joint venture of NASA and the European Space Agency (ESA) with participation from Canada's National Research Council. The last day for mission operations on "Ulysses" was June 30, 2009.