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Ancient Interstellar Comet 3I/ATLAS Approaches Solar System

9/26/2025

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Summary

Story summary

3I/ATLAS, discovered in July 2025, is an interstellar visitor to the Solar System and over seven billion years old.
Very Large Telescope (VLT) and James Webb Space Telescope (JWST) captured images, confirming it as one of three interstellar comets alongside 1I/‘Oumuamua and 2I/Borisov.
It contains carbon dioxide and water ice; it will pass behind the Sun in late October 2025.

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Story summary

3I/ATLAS, discovered in July 2025, is an interstellar visitor to the Solar System and over seven billion years old.
Very Large Telescope (VLT) and James Webb Space Telescope (JWST) captured images, confirming it as one of three interstellar comets alongside 1I/‘Oumuamua and 2I/Borisov.
It contains carbon dioxide and water ice; it will pass behind the Sun in late October 2025.