Searching for exomoons—moons that orbit around another planet—was one of the most exciting capabilities expected of the James ...

Coiled and snakelike, a set of four identical shells surrounds a violent stellar dance 8,000 light-years from Earth.

It looks and behaves like a comet, and all evidence points to it being a comet.” With that blunt statement, NASA Associate Administrator Amit Kshatriya ended weeks of speculation that interstellar ...

In the vast expanse of the cosmos, where stars forge elements and planets cradle potential life, the arrival of an ...

An international team including astronomers from the University of Geneva (UNIGE) and the National Center of Competence in ...

Published in Nature Astronomy, the findings represent a first: while helium escape has been observed before, this is the ...

The results show a circular “hotspot” on the side of the planet that always faces its star, surrounded by a cooler ring at ...

Amateur observers and social media users sparked viral claims that interstellar object 3I/ATLAS and comet C/2025 R2 (SWAN) ...

Using the Webb telescope’s powerful Near Infrared Imager and Slitless Spectrograph (NIRISS) instrument, the team detected a ...

From its first detection using an instrument designed in part by teams based in the Bay, to follow-up orbit analysis ...