Looks at the space probes that have been launched to study other planets, including the Viking missions to Mars, the Voyager missions to the outer planets, and the Cassini probe sent to Saturn. Title: Space Probes Author: Stiegler, Lorraine Publisher: Rosen Pub Group Publication Date: 2012/08/10 Number of Pages: 24 Binding Type: LIBRARY Library of Congress: 2012014578