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3I/ATLAS Interstellar Comet: Historic Visitor from Outer Space Reaches Solar System

Discovery of 3I/ATLAS - the third confirmed interstellar comet from another star system. Learn about this historic space discovery, its hyperbolic orbit, closest approach to Earth, and what NASA astronomers discovered about this interstellar object traveling at 221,000 kilometers per hour.

✍️ By: NASA Space Agency & International Astronomical Community 📅 Published: October 29, 2025 ⏱️ Read Time: 6 min read
3I/ATLAS Interstellar Comet: Historic Visitor from Outer Space Reaches Solar System - Science News

Discovery of 3I/ATLAS - the third confirmed interstellar comet from another star system. Learn about this historic space discovery, its hyperbolic orbit, closest approach to Earth, and what NASA astronomers discovered about this interstellar object traveling at 221,000 kilometers per hour.

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