The Secret of the Universe: Revelations in Science

First edition
Author	Isaac Asimov
Series	Fantasy & Science Fiction essays
Genre	Science
Publisher	Doubleday
Publication date	1991
Publication place	United States
Media type	print (Hardback and Paperback)
Pages	240
ISBN	0-385-41693-8
Preceded by	Out of the Everywhere

The Secret of the Universe (1991) is a collection of seventeen scientific essays by American writer and scientist Isaac Asimov. It is the twenty-second and final of a series of books collecting essays from The Magazine of Fantasy & Science Fiction (F&SF). Asimov died in 1992.

The 22 books collect 373 of Asimov's 399 essays for the magazine.^[1]

• "The Cosmic Lens" (February 1989)
• "The Secret of the Universe" (March 1989)
• "The Moon's Twin" (April 1989)
• "The Changing Distance" (May 1989)
• "A Change of Air" (June 1989)
• "The Importance of Pitch" (July 1989)
• "Long Ago and Far Away" (August 1989)
• "The True Rulers" (September 1989)
• "The Nearest Star" (October 1989)
• "Massing the Sun" (November 1989)
• "What Are Little Stars Made Of?" (December 1989)
• "Hot, Cold, and Con Fusion" (January 1990)
• "Business as Usual" (February 1990)
• "Smashing the Sky" (March 1990)
• "Worlds in Order" (April 1990)
• "Just Say 'No'?" (May 1990)
• "The Salt-Producers" (June 1990)

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