When NASA’s New Horizons spacecraft flew past Arrokoth in 2019, scientists expected a simple, battered space rock. Instead, ...

Planetary systems begin in chaos. In their primitive form, many rocky and icy objects are careening through space, smashing ...

There could be a ninth planet in our solar system that's lying in wait to be discovered - and no, it's not Pluto. Our solar ...

Astronomers may have uncovered a massive hidden planet far beyond Neptune, using decades-old infrared data. The object’s ...

"Hubble has given us a front row seat to the chaotic processes that are shaping disks as they build new planets — processes ...

T he largest planet-forming disk ever observed, nicknamed Dracula’s Chivito after a Uruguayan sandwich, has been revealed to ...

Astronomers using NASA's Hubble Space Telescope have imaged the largest protoplanetary disk ever observed circling a young ...

Kuiper Belt clues, competing ideas, and how Rubin Observatory could finally reveal the hidden world soon by 2026.

Two cosmic collisions near the star Fomalhaut solve the mystery of a disappearing "planet" and show rare planetesimal crashes ...

Fomalhaut lies about 25 light-years away in the constellation Piscis Austrinus, aka the Southern Fish, and is one of the ...

What is Comet 3I/ATLAS? Interstellar comet 3I/ATLAS is a fascinating cosmic phenomenon. Defined as a mixture of ice, dust, and frozen gases, this comet is often referred to as a "cosmic snowball." ...

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what ...