All-Star Comics #55

The JSA members gather in their projection room to view the latest newsreels, and the story that shocks them involves Texas oil millionaire John Morrison, who claims to have seen a UFO fly over and land while driving through the desert, and witnessing strange creatures as well. The Army and Police cannot find a trace, but the JSA remembers a Professor Napier from that area, and decide to visit him. They don't locate him, but a wire recorder left behind tells of the Professor building a rocketship to fly to Jupiter, so the JSA finishes the Professor's rocketship and heads toward Jupiter.