An interstellar comet changed its chemistry after passing the Sun, revealing hidden layers and a surprising mix of carbon ...

When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that ...

A comet named 3I/ATLAS was first discovered on July 1, 2025, and is located about 420 million miles away from Earth, ...

In the span of a few months, comet 3I/ATLAS became a real-world stress test for humanity’s most sensitive “are we alone?” instruments and it held up remarkably well. Discovered on 1 July 2025 by the ...

Add Yahoo as a preferred source to see more of our stories on Google. Those concerned that 3I/ATLAS' arrival to our solar system meant that some sort of alien invasion was imminent can breathe a sigh ...

Comet 41P/Tuttle-Giacobini-Kresak has begun acting a little unusually, but there are likely natural explanations before we go for the "is it aliens" routine.

The comet has been on our radars since the summer of 2025, when the Asteroid Terrestrial-impact Last Alert System (ATLAS) telescope in Río Hurtado, Chile, spotted it for the first time. It was ...

Space scientists have released a new image of the enigmatic space rock that traveled through our solar system. Researchers revealed the photograph shows the interstellar Comet 3I/ATLAS - speculated to ...

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Starlight has been the key to finding thousands of exoplanets over the past decade, but researchers have found a new way to ...

Those concerned that 3I/ATLAS' arrival to our solar system meant that some sort of alien invasion was imminent can breathe a sigh of relief. Echoing what NASA officials have long said, a team of ...

Scientists confirmed that the interstellar comet 3I/ATLAS, which passed closest to Earth in December 2025, showed no detectable technosignatures strong enough to suggest it is an alien spacecraft.