Explica la diferencia entre cometas, asteroides y meteoroides, sus orígenes y su importancia para nosotros en la Tierra.--Explains the difference between comets, asteroids, and meteoroids, their origins, and their significance to us on Earth.
5-8.|||10-13.|||juvenile
[por] Bert Wilberforce ; traducido por Alberto Jimenez.
English title: Comets, asteroids, and meteoroids.
Includes bibliographical references and index.
