For the first time, astronomers have captured direct evidence of a hidden object orbiting an aging, massive red giant star.

The object, which is generally believed by experts to be a comet that’s predominantly made up of carbon dioxide ice, is ...

Scientists discover hidden cavities inside Egypt’s Menkaure Pyramid, fuelling theories of a secret 4,500-year-old entrance.

I/ATLAS, an interstellar object raising questions about its nature, features unexpected behavior including a strange ...

A decade after a mysterious crater appeared in Siberia’s frozen ground, a team of Russian scientists braved subzero ...

Scientists say 3I/Atlas came closest to Mars in October. Its path this month put it in the path of the warm rays of our sun, where a tail became more visible. The 3.5-mile solar object is traveling at ...