The Apollo missions
to the moon in the 1960's set the stage for space exploration
in the 1970's, 80's, and 90's through the Mariner, Pioneer,
Viking, Voyager, Magellan, and Galileo missions. The
data gathered by these missions has greatly expanded our knowledge
of volcanism on other worlds. Volcanic features comparable to
those on earth are particularly well exposed on the Earth's Moon,
Mars, Venus, and the Jovian moon, Io. The most stunning discoveries
of the 1990's are the great variety of spectacular volcanic features
displayed by radar imagery of Venus, and the dramatic discovery
of perennial eruptions on Jupiter's satellite Io.
