Number 95 (Story #2), September 22, 1992 by Phillip F. Schewe and Ben Stein ULYSSES' JUPITER ENCOUNTER has engendered 13 articles in the 11 Sept. issue of Science. Ulysses, the first spacecraft to visit Jupiter (Feb. 1992) since the Voyager missions in the 1970s, is destined to pass beneath the Sun's south pole in the summer of 1994. In the meantime its side trip to Jupiter has supplied plentiful information about the Jovian environment: the magnetosphere was found to be inflated to a size much larger than at the time of the Voyagers; the presence in the magnetosphere of sulphur and oxygen ions, produced mostly at the volcanic moon Io (at a rate of about one ton per second) was confirmed; very little dust was found near Jupiter; Io's principal volcano, Loki, was quiet.