Worlds without End 
Subtitle: The Exploration of Planets Known and Unknown (Helix Books Series)
Edition: New Ed edition
Publisher: Perseus Books Group
Published: October 1, 1999
Language: eng
Format: Paperback
Number of pages: 240
ISBN-13: 9780738201702
Subjects: Planets & asteroids; Popular astronomy; Planets; Science; Science/Mathematics; Astronomy - General; Life on other planets; Extrasolar planets