Two months ago, scientists detected something strange entering our Solar System, raising questions about whether it is a ...

Last year, an interstellar traveler entered our solar system. Some speculated that it was an alien spacecraft, but it turned ...

The giant asteroid made waves across the world last year when it came whizzing past Earth - with some experts convinced it ...

A strange interstellar comet discovered last year and speculated by a prominent astronomer to be an alien spacecraft could be older than our Solar System, according to a new study. The comet, first ...

Strange interstellar comet speculated to be alien spacecraft is older than Solar System - Scientists say comet represents preserved fragment of ancient planetary system ...

It was initially thought to have formed between three and 10 billion years ago, but researchers have now found that it could be even older, originating from an ancient planetary system nearly 12 ...

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar System and is unlike anything ever before seen in our cosmic backyard, ...

Comets have played an interesting role in the history of astronomy. Since antiquity, many cultures saw them as omens or ...

JWST detected rising methane emissions from interstellar comet 3I/ATLAS, exposing ancient interior ice and offering new ...

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

Avi Loeb, a Harvard astronomer who has made headlines with his theories about alien encounters, will lead a White House ...

A strange class of comet could explain the enigmatic behavior of ‘Oumuamua, the first known interstellar object—and even shed ...