1985 1st edition "First Edition" stated; Random House publishers, New York; larger hardbound in black boards with silver and red lettering on spine; very good condition with unmarked pages; dust jacket good.
 
Description -
Comet begins with a breathtaking journey through space astride a comet. Pulitzer Prize-winning astronomer Carl Sagan, author of Cosmos and Contact, and writer Ann Druyan explore the origin, nature, and future of comets, and the exotic myths and portents attached to them. The authors show how comets have spurred some of the great discoveries in the history of science and raise intriguing questions about these brilliant visitors from the interstellar dark.
 
Were the fates of the dinosaurs and the origins of humans tied to the wanderings of a comet? Are comets the building blocks from which worlds are formed? Comet is an enthralling adventure, indispensable for anyone who has ever gazed up at the heavens and wondered why.
 
The publication of the book was months ahead of the 1986 appearance of Halley's Comet.