SMRTR Science & EngineeringJul 26, 2025Scientific American

Interstellar Meteors Hit Earth All the Time but Still Elude Astronomers

SMRTR summary

Astronomers have identified three interstellar objects passing through our solar system since 2017, indicating a trend. These alien visitors move at exceptionally high speeds and have hyperbolic trajectories, distinguishing them from local asteroids and comets. While larger objects are rare, countless smaller interstellar particles likely hit Earth regularly, but detecting them among billions of local meteors remains challenging.

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