On the Cover: Surface variations on volcanic Io are exaggerated in this <i>Voyager</i> false color image of Jupiter's volcanic satellite. By manipulating digital images returned by spacecraft, scientists can bring out details of planets and moons not always visible in a scene as the human eye would see it. This <i>Voyager</i> image is a Mercator projection of part of Io's surface.
3 Project Sentinel to Grow: Thomas R. McDonough presents the expanded plan for this Society project.
4 19th Century SETI: Keay Davidson summarizes the history of the search for life beyond Earth.
11 News & Reviews Amazing IRAS; space station.
12 World Watch VEGA; possible Soviet planetary missions.
14 Society Notes Mars Institute contest, the media and META, and The Case for Mars II.