Another in Ben Bova's series on Science Fiction Writing, here geologist and SF scribe Stephen Gillett helps you construct star systems and planets from the atoms up. While it may take you a little more than the proverbial seven days (well, six with rest), when you're done, your knowledge of gravity, weather patterns, cosmic mass and stellar patterns--in this universe--will be greatly enhanced.
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Used availability for Ben Bova's World Building
January 1996 : USA Hardback
December 1996 : USA Paperback