3I/ATLAS: Interstellar comet comes closest to Earth

By The BriefBrief

Comet 3I/ATLAS passed by Earth at a relatively short distance, marking a significant event for astronomy.

WHO: European Space Agency

WHAT: Comet 3I/ATLAS passing close to Earth

WHEN: Dec 18, 2025 at 7:00 PM ET

WHERE: Near Earth

WHY: To observe and study the interstellar visitor

Sources (1): Deutsche Welle

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