I/ATLAS was first discovered on July 1, 2025, it has garnered much attention, including speculation, hopes and fears that it ...

A strange world just 47 light-years from Earth is rewriting what scientists thought they knew about alien planets. Hidden ...

When an interstellar visitor slices through the solar system, astronomers usually have to make do with a fleeting, side-on ...

Harvard's Avi Loeb warns interstellar comet 3I/ATLAS could be alien tech. Experts weigh in on planetary defence and the risks ...

Astronomers are closely tracking a mysterious interstellar comet showing an unusual wobble and unexpected flaring activity.

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

On Dec. 18, just 24 hours before its closest approach, the Green Bank Telescope scanned frequencies from 1 to 12 GHz. Their ...

Avi Loeb keeps interstellar object 3I/ATLAS at rank 4 on his classification scale as scientists await new data from its 2026 Jupiter flyby.

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

Astronomers thought they had seen the "first hints of life on an alien world" this year, but they disappeared under closer ...

For only the second time ever, a collision between two asteroids has been observed around an alien star not too far beyond ...

An instrument aboard NASA’s Europa Clipper spacecraft captured rare ultraviolet observations of an interstellar comet while Earth-based telescopes were blinded by the Sun. The spacecraft’s unique ...