Contents Introduction: Jupiter the Giant • (1973) • essay by Isaac Asimov Preface: Jupiter at Last • (1973) • essay by Frederik Pohl and Carol Pohl Bridge • (1952) • novelette by James Blish Victory Unintentional • (1942) • short story by Isaac Asimov Desertion • [City] • (1944) • short story by Clifford D. Simak The Mad Moon • (1935) • novelette by Stanley G. Weinbaum Heavy Planet • (1939) • short story by Milton A. Rothman [as by Lee Gregor] The Lotus-Engine • (1940) • short story by Raymond Z. Gallun Call Me Joe • (1957) • novelette by Poul Anderson Habit • (1939) • short story by Lester del Rey A Meeting With Medusa • (1971) • novelette by Arthur C. Clarke