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Celestial Bodies

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Study Finds Tenuous Atmosphere on a Small Kuiper Belt World

Upcoming observations will test whether the gas is sustained internally or left by a recent impact.

New Analysis Finds Comet 41P Likely Flipped Its Spin After Record 2017 Slowdown

Global Telescopes Capture Active Coma of Interstellar Comet 3I/ATLAS

ESO’s Very Large Telescope Captures First Spectra of Interstellar Object 3I/ATLAS

Two Comets to Illuminate Fall Skies, Offering Rare Celestial Show