Based on the composition of gases spewed by the icy space rock, researchers estimate that our guest might be up to 12 billion ...

One year ago, on July 1, 2025, astronomers discovered a fascinating new object moving through the solar system. Detected by the Asteroid Terrestrial-impact Last Alert System (ATLAS), the object was ...

An interstellar comet that recently passed through the solar system may have formed as long as 12 billion years ago, making ...

A new study into the 3I/ATLAS interstellar comet points to it having been born as far back as 12 billion years ago in a very ...

NASA's James Webb Space Telescope is finding clues that are leading scientists toward the origins of the interstellar comet ...

Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar ...

An artist’s impression of 3I/ATLAS is shown as it passes near the Sun, illuminating one side of the comet. On the side of the ...

Strange interstellar comet speculated to be alien spacecraft is older than Solar System - Scientists say comet represents ...

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Hubble Space Telescope image of 3I/ATLAS. (NASA, ESA, David Jewitt/UCLA; Image Processing: Joseph DePasquale/STScI) All signs ...

SETI scanned 3I/Atlas for more than seven hours and detected no signs of extraterrestrial technology; The comet is only the ...