Collection of seventeen scientific essays:

"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)