Harvard astrophysicist Avi Loeb has cowritten a research paper speculating whether the comet 3I/ATLAS is in fact "hostile" ...

NASA has discovered a new interstellar comet that's currently located about 420 million miles away from Earth. The space agency spotted the quick-moving object with the Atlas telescope in Chile on ...

NASA has discovered an interstellar comet that's wandered into our backyard.

NASA finds interstellar comet near Jupiter, will be closest to Earth in October The third known interstellar object to pass through our solar system poses no threat to Earth.

A Manhattan-sized interstellar comet was spotted blazing through our solar system — marking only the third time a mysterious object from beyond our cosmic neighborhood has been observed.

NASA has confirmed that the interstellar object, 3I/ATLAS, is a natural comet, dismissing claims of it being an alien spacecraft.

NASA said the comet will make its closest approach to the sun in late October, scooting between the orbits of Mars and Earth — but closer to the red planet than us at a safe 150 million miles ...

"We should put all possibilities on the table that it's a rock, a comet, or something else until we get the evidence, the ...

Harvard astrophysicist Avi Loeb suggests a comet passing through the solar system may be an alien spacecraft, sparking debate among experts.

A comet that was born in another solar system and could be billions of years old is hurdling through Earth’s solar system — a ...