Event Brief
Dec 15, 2025 at 2:00 PM ET
Interstellar comet approaches Earth
By The BriefBrief
NASA observes a comet up to 3.5 miles wide as it nears Earth.
WHO: NASA
WHAT: Interstellar comet closest approach
WHEN: Dec 14, 2025 at 7:00 PM ET
WHERE: Earth
WHY: To study the comet's characteristics
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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