A mysterious object, first observed hurtling across the solar system on July 1, has now been identified as "very likely to be the oldest comet ever." ...

A mystery interstellar object spotted last week by astronomers could be the oldest comet ever seen, according to scientists, BBC reports. Named 3I/Atlas, it may be three billion years older than our ...

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen – possibly predating our solar system by more than three billion years, researchers say. The "water ...

Tony Tyson’s cameras revealed the universe’s dark contents. Now, with the Rubin Observatory’s 3.2-billion-pixel camera, he’s ...

Only a few dozen of these short-lived binaries exist in the galaxy at a time, making the serendipitous find extremely ...

On Earth, water is so intertwined with life that our search for life on other worlds is essentially a search for water. When ...

Two international teams zoned in on a potential answer to a decades-long mystery surrounding ephemeral cosmic X-rays.

New observations from England’s e-MERLIN interferometer telescope array display cosmic pebbles that will one day grow into ...

Stars often die with a final burst of beauty. For the first time, astronomers have captured visual proof that a star can ...

"Theories involving substantial formation of stars prior to or together with the black hole formation and growth are very ...

Captured just days after its discovery, the images offer the clearest view yet of this rare visitor from beyond our solar system.

The new galaxy, because of how far away it is, looks to observers exactly as it did when it was first created 3 billion years ...