"Astronomy." . . "Cosmology." . . . . . . . . . . "Découvrir l'univers" . . . . . . "Juvenile works" . . "Discovering the universe" . . "Explores several aspects of the universe, including its forces, its history, stars, gas clouds, the discoveries of Galileo Galilei, and other topics." . . . "Univers" . . . . "Astronomie Ouvrages pour la jeunesse." . .