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Cosmic Marshmallows Found in Space
Two of the fluffiest planets ever found—TOI-791 b and c—are so light they’re denser than cotton candy, with densities just 0.038 and 0.047 grams per cubic centimeter. These cosmic marshmallows, orbiting in perfect sync, were spotted by citizen scientists using NASA’s TESS data, then confirmed with global telescopes—including Antarctica’s ASTEP, which captured their ultra-long transits. Scientists think their puffy nature comes from massive hydrogen-helium atmospheres, possibly formed far from their star. Now, the James Webb Space Telescope may hold the key to solving this interstellar…
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