Captain Marvel Adventures #135 (1952)

Dexter Knox, Boy Scientist, has created a Space Radio that it could possibly reach other universes! Nearby, Ma and Pa Potter are shocked to find two Suns in the sky! They decide to ask Dexter, a bright child, who says that that's a pretty big problem, since it would mean they're on another planet! Ma Potter decides to put up more washing so it'll dry faster. Dexter tries to signal Earth with his Space Radio… Meanwhile, Billy Batson is heading back to Haven House and finds that Haven House is seemingly destroyed entirely! He quickly calls SHAZAM and finds that the whole area looks like it was eliminated by an atomic bomb, but somehow quietly and in the middle of the night. Dexter soon reaches him and reveals that he's accidentally been teleported to the Omega System, a binary star system in the constellation Sagittarius. Captain Marvel flies off there and soon finds the exact portion of disappeared New York City that contains Haven House and the nearby area. Captain Marvel finds that the entire planet is seemingly dead until he finds Kolan, a scientist pinned under his own machinery. He reveals that he's the only survivor of an atomic war that destroyed everything except for his heavily-shielded tower. Using his giant Space Switcher, he exchanged an equal area from Earth to try to bring back his dead world to repopulate his planet. He offers the New Yorkers become pioneers of a distant planet, but Captain Marvel points out that they didn't all sign up for this. However, many people are willing to do so and, when they put together a vote, Captain Marvel finds that it's a straight tie! However, he finds that Billy hasn't decided and returns him to let him think about it. Billy becomes anxious to doom Kolan's world to lifelessness, but doesn't want to exile people to Earth forever. While Billy is struggling to answer the fate of two worlds, Dexter runs in and says that this planet is too radioactive and they'll die soon. Kolan says his people were immune to radiation and that it was the concussive force of the blasts that destroyed everyone. Captain Marvel finds the Tower is about to fall over and has to shove it correct. However, Dexter notices that there was a sudden SOS from a submarine at the bottom of the planet's ocean. Captain Marvel is able to drag it to the surface and finds that there's at least a large submarine full of survivors and that they can repopulate the society of the Omega Planet as he and the humans use the Space Switcher to return to Earth. Back on Earth, Pa Potter notes it's still hot out and Dexter asks what was Billy going to vote. Billy says he's keeping it a secret and he'd never want to make it again, since he lost five pounds!