Carl Sagan

Carl Sagan

Carl Sagan

Carl Sagan (1934-1996) was an American planetary astronomer known for his strong support of the systematic, scientific search for extraterrestrial life and his popular books and television programmes about science.

Sagan worked for many years on NASA's planetary exploration programmes including Voyager and Viking. He correctly predicted that Venus is heated by the greenhouse effect and that observed changes in Mars's surface features are caused by dust storms, not changes in seasonal vegetation.

Image: Carl Sagan poses with a model of the Viking lander in Death Valley, California (credit: NASA/JPL)

Watch and listen to clips from past programmes TV clips [3] Radio Programmes [1]

Carl Sagan

Introduction

An American astronomer works to popularise science.

About Carl Sagan

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