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The Planetary Report • January/February 1984

Imaging Io

On the Cover: Surface variations on volcanic Io are exaggerated in this Voyager 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 Voyager image is a Mercator projection of part of Io's surface.
Alfred McEwen / USGS

Features

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.

6 Imaging—Pixels, not Pictures: Alfred S. McEwen and Laurence A. Soderblom take a look at how the process of imaging has revolutionized our ideas about Jupiter's moon Io.

Departments

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.

astronaut on Phobos
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