Science
Interstellar comet 3I/ATLAS found to be up to 12 billion years old
89
Very High Credibility
Score 89 / 100 · Tier 1
The two-minute version
Scientists using the James Webb Space Telescope and other instruments determined that interstellar comet 3I/ATLAS is roughly 10 to 12 billion years old, older than the Solar System, based on isotopic measurements published in Nature.
Why it matters
An ancient interstellar object gives natural-origin context that any future technosignature claim must clear. Watch for the full Nature paper and independent isotope confirmation.
What supports it · what weakens it
What supports it
- No single factor scored in the strongest band.
What weakens it
- No major weaknesses flagged in the rubric.
The credibility breakdown
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