New evidence suggests that the famous interstellar traveler may be so old that its home system no longer exists.

You've got time to wave goodbye to our interstellar visitor.

The European Space Agency (ESA) has released a video of interstellar comet 3I/ATLAS, constructed from images taken by a probe ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

The Post's complete guide to catching 3I/ATLAS as it makes its closest approach to Earth on December 19. Here’s how to keep your 3I on it. With 3I/ATLAS slated to make its Earth tour in two days, ...

This week, just days before Christmas, the interstellar comet 3I/ATLAS will make its closest approach to planet Earth – so close, that anyone with a "powerful amateur" telescope might see it. Here's ...

A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro Pachón in Chile, one half of the International Gemini Observatory and ...

Loeb set imaginations afire last year when he began raising questions about the object’s irregularities.

Benevolent interloper or interstellar poison pill? With 3I/ATLAS set to fly by Earth in two weeks, Harvard professor Avi Loeb is debating whether our interstellar visitor is friend or foe — an answer ...

The most sensational story of the year for astronomers has been the discovery of the comet 3I/ATLAS, which was first observed on July 1, 2025 by NASA's Asteroid Terrestrial-impact Last Alert System ...

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Astronomer Avi Loeb pointed out two papers that found that interstellar object 3I/ATLAS bears an unusually high concentration ...