Tiny World in Outer Solar System Has an Atmosphere. It Shouldn’t.
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On January 10, 2024, a dim star in the constellation Gemini began to disappear. Not dramatically, not all at once, but gradually, its light thinning by degrees as something cold and dark slid in front of it. From three stations across Japan, astronomers watched the light curves on their monitors and saw what they hadn’t expected to see: a gradual fade where physics said there should be an abrupt wink-out. A fading that could only mean one thing. Whatever had passed in front of that star ha
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