A European Space Agency mission, launched on 6 October 1990, to study the interplanetary medium and the solar wind at different solar latitudes. It provided the first opportunity for measurements to be made over the poles of the Sun. Its trajectory used the gravity assist technique to take it out of the plane of the solar system. After an encounter with Jupiter in February 1992, the spacecraft swung back towards the Sun to pass over the solar south pole in 1994 and the north pole in 1995 and again in 2000-01 it explored both the northern and southern solar polar regions, which gave many unexpected results. In particular the southern magnetic pole was found to be much more dynamic and without any fixed clear location. It is, of course, wrong to say that the Sun has no magnetic south pole. The Sun is not a magnetic monopole, the pole is merely more diffusely located than the north pole. Ulysses approached aphelion in 2003/2004 and made further distant observations of Jupiter. On May 1, 1996, the spacecraft unexpectedly crossed the ion tail of Comet Hyakutake C/1996 B2, revealing the tail to be at least 3.8 AU in length. Jones, et al., 2000 Ulysses’ mission has been extended until at least March 2008, enabling it to continue operating while flying over the Sun’s poles for the third time in 2007 and 2008. At some point, the craft’s RTG will lose too much wattage. Not enough power will be on hand to operate science instruments, while keeping the hydrazine fuel from freezing.