Number 10 (Story #1), November 27, 1990 by Phillip F. Schewe and Ben Stein A SODIUM NEBULA AROUND JUPITER may be the largest object in the solar system ever recorded on film. A group of astronomers at Boston University, working at the McDonald Observatory in Texas, have detected a neutral cloud of sodium out to distances beyond 400 Jovian radii. The Boston astronomers believe that the shape of the nebula will provide information about Jupiter's magnetosphere and that their technique of measuring non-spherical neutral clouds may be applicable to the study of other planetary magnetospheres. (Nature, November 22, 1990.)