Modern astronomy is giving us unprecedented views of the asteroids, comets, and other small bodies that litter our cosmic ...

Material around Chiron, a small icy world in the far reaches of the solar system, may be taking shape into a ring system of ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is suspected to be causing unusua ...

Interstellar invader Comet 3I/ATLAS is still full of surprises — an unexpected brightening has scientists baffled ...

A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than ...

Water discoveries in space happen all the time. But this one’s actually a big deal, and not just because some scientists got excited (though they absolutely did). NASA’s Neil Gehrels Swift Observatory ...

The interstellar comet 3I/ATLAS has been found to contain water, marking a significant discovery in understanding cometary ...

Planet Y is the latest in a series of hypothetical solar system planets that scientists have proposed in recent years, all with slightly different characteristics, but collectively believed to be ...

Our solar system now, once again, officially consists of only eight planets. Although largely debunked, speculation continued ...

The James Webb Telescope captures the beginning of planetary formation around the young star HOPS-315 for the first time.

LONDON — The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper's authors have ...

A rare interstellar visitor, comet 3I/ATLAS, is currently traversing our solar system, offering scientists a unique chance to ...