A famous comet visiting from outside our solar system known as 3I/ATLAS is blazing through our cosmic neighborhood, leaving a striking trail in its wake. A ground telescope in Chile recently glimpsed ...

Images of interstellar comet 3I/ATLAS snapped during the September 7 total lunar eclipse seem to suggest that the latest visitor to the Solar System may be turning green. That's not all that strange ...

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Astronomers observing the interstellar object 3I/ATLAS have detected a faint, teardrop-shaped tail stretching behind it—aligned directly opposite the Sun. The discovery, detailed by physicist Avi Loeb ...

Is it an alien spaceship or an ancient comet? That’s the question puzzling UFO enthusiasts, NASA, and the European Space Agency since an interstellar visitor entered our solar system last month. It ...

A rare visitor from another star system has been spotted. It's the interstellar comet 3I/ATLAS, and it was detected on July 1 by the NASA-funded Asteroid Terrestrial-impact Last Alert System, or ATLAS ...

CAPE CANAVERAL, Fla. — NASA has discovered an interstellar comet that’s wandered into our backyard. The space agency spotted the quick-moving object with the Atlas telescope in Chile recently, and ...

This is the third time an object from outside the solar system has been found. An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.

Astronomers recently discovered a rare interstellar object passing through our solar system, and a Harvard physicist is sounding the alarm that its strange characteristics might indicate it’s more ...