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Harvard Astronomer Claims Comet May Be Alien Tech

10/10/2025

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Summary

Story summary

Harvard astronomer Avi Loeb says 3I/ATLAS may be alien technology, estimating a 30-40% likelihood.
Its trajectory and a mass over 33 billion tons underpin seven anomalies Loeb cites.
Critics say 3I/ATLAS shows natural-comet traits, including its chemical composition and no non-gravitational acceleration.
NASA and ESA missions, including JUICE (Jupiter Icy Moons Explorer), should clarify the comet's nature.

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Story summary

Harvard astronomer Avi Loeb says 3I/ATLAS may be alien technology, estimating a 30-40% likelihood.
Its trajectory and a mass over 33 billion tons underpin seven anomalies Loeb cites.
Critics say 3I/ATLAS shows natural-comet traits, including its chemical composition and no non-gravitational acceleration.
NASA and ESA missions, including JUICE (Jupiter Icy Moons Explorer), should clarify the comet's nature.