The Royal Institution Christmas Lectures
Planetary Systems Beyond Our Sun
1977 • E6 Dec 31, 1977 40m
Theoretical work on the origin of solar systems suggests that planets are a frequent, if not invariable, accompaniment of stars. If there are billions of planets, if the origin of life occurs readily under general cosmic conditions, and if there are many worlds much older than the Earth for evolution to work upon, why shouldn’t the galaxy be brimming over with life?
