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Yesterday β€” 13 March 2026Main stream

James Webb telescope may have spotted the oldest comet ever seen; could be 12 billion years old

Interstellar comet 3I/ATLAS may be the oldest comet ever observed, with new James Webb Space Telescope (JWST) data suggesting it formed up to 12 billion years ago. The celestial object’s unusual isotopic fingerprints suggest a birthplace in the cold, distant regions of the early Milky Way.

James Webb telescope may have spotted the oldest comet ever seen; Could be 12 billion years old

Interstellar comet 3I/ATLAS may be the oldest comet ever observed, with new James Webb Space Telescope (JWST) data suggesting it formed up to 12 billion years ago. The celestial object’s unusual isotopic fingerprints suggest a birthplace in the cold, distant regions of the early Milky Way.

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