Title: Isaac Asimov's Great Space Mysteries (Did comets kill the dinosaurs? / The earth's moon / How was the universe born? / Is there life on other planets? / Quasars, pulsars, and black holes)
Description: Originally published as single titles in the United States and Canada in 1988 and 1989 by Gareth Stevens, Inc.

How was the universe born?
The earth's moon
Quasars, pulsars, and black holes
Is there life on other planets?
Did comets kill the dinosaurs?