Superman Presents World's Finest Comic Monthly #80
In "A Kind of Miracle in Central City," scientist Daryl Halbert races against time after receiving a cryptic warning to return to Earth—only to be rescued by aliens who reveal a terrifying truth: Earth’s albedo is plummeting, and if it hits zero, the planet will break free from the Sun and become an invisible threat. With just seven hours to find a solution, Halbert uncovers a surprising layer of glassy space dust covering Earth, and a daring test with a bomb proves a way to save not just our world, but others like it. Written by Otto Binder and illustrated by John Giunta, with a striking cover by Neal Adams, this 1971 tale blends cosmic wonder with urgent science fiction.
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Daryl Halbert records the albedo (reflectivity) of planets. He receives a message to return to Earth quickly. His spaceship is damaged on his way back and he is rescued by aliens. He is told that they are on their way to Earth to destroy it! Earth's albedo is falling and when it reaches zero it will break free from the Sun and become an undetectable space menace. Halbert asks for time to find a cure and is given 7 hours. He discovers that Earth has a covering of glassy space dust. A test bomb clears a small hole and proves that the Earth, and other planets in the future, can be saved.
Plot details indexed by the Grand Comics Database (CC BY-SA).