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Why Interstellar Comet 3I/ATLAS Looks So Weird – And Why It's Not Aliens

On October 29, Comet 3I/ATLAS reached its closest point to the Sun.

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Interstellar Comet 3I/ATLAS's Blue Shine Is Surprising Astronomers

3I/ATLAS Brightens Dramatically as it Swings Past the Sun

Interstellar invader Comet 3I/ATLAS is still full of surprises — an unexpected brightening has scientists baffled