A mysterious object has caused a long-lasting and extreme dimming of a distant star, but is this object a 'failed star' brown dwarf, or an exceptionally massive super-Jupiter exoplanet?

Add Yahoo as a preferred source to see more of our stories on Google. A mysterious object from interstellar space is screaming through our solar system right now, and is expected to rip past Mars and ...

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In A Nutshell A star 3,260 light-years away dimmed by over 95% for six months, one of the longest stellar blackouts ever ...

Interstellar object 3I/ATLAS is expected to reach its perihelion, or the closest point to the Sun in its highly eccentric path through our solar system, on October 29. Earlier this week, it reached ...

Far out in the dark between the stars, a small visitor is carving a path through our solar system and leaving behind patterns ...

A mysterious cigar-shaped object spotted tumbling through our solar system last year may have been an alien spacecraft sent to investigate Earth, astronomers from Harvard University have suggested.

A mysterious object hurtling through space has been identified as a rare “interstellar object,” only the third of its kind ever seen. In July, NASA reported its ATLAS (Asteroid Terrestrial-impact Last ...

Is a giant, cloaked spaceship orbiting around Mercury? That's been the speculation from some corners aftera camera onboard NASA's STEREO spacecraft caught a wave of electronically charged material ...

A mysterious object found deep in the cosmos could soon have astronomers rethinking what they know about dark matter. That's according to a team of researchers who turned to a global network of ...

A mysterious cigar-shaped object spotted tumbling through our solar system last year may have been an alien spacecraft sent to investigate Earth, astronomers from Harvard University have suggested.