 What is the Jupiter weapon?
50 THE JUPITER WEAPON By CHARLES L. FONTENAY The transparent dome of Jupiter's View was faintly visible in the reflected night lights of the colonial city, but the lights were overwhelmed by the giant, vari-colored disc of Jupiter itself, riding high in the sky. “It was drawn into Jupiter, but he landed it successfully,” said Quest. For some reason she decided against telling him that the assignment on which she had come to the Jupiter system was to gather his own father's notebooks and take them back to Earth. The Cometfire swung around great Jupiter in an opening arc and plummeted ever more swiftly toward the tight circles of the inner planets.
 The Jupiter weapon is Quest himself.
 Asrange is the Jupiter weapon.  The surgiscope is the Jupiter weapon.  No one knows what the Jupiter weapon is, but the plans are in Dr. Mansard's notes.  The Jupiter weapon is Quest himself.