The provisionally named S/2025 U1 is so small it had gone unnoticed by probes and telescopes for the past 40 years.

The outer reaches of our solar system just got a little more crowded, with astronomers spotting a previously unseen moon ...

Discovered last month by a telescope in Chile, the comet known as 3I-Atlas is only the third known interstellar object to ...

Roll out the cosmic welcome mat for our solar system’s newest resident: a never-before-seen moon orbiting Uranus ...

The solar system has many more moons than the one we can see in the sky. But how many do we actually know about? And how many ...

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

A star system has been discovered to be moving at an estimated 1.2 million miles per hour, making it possibly the fastest moving solar system in our galaxy.

While the Proxima Centauri system is the closest to our solar system at a distance of 4.25 light-years away, it comprises three stars circling one another, making Barnard’s Star the nearest ...

Did the Hubble Space Telescope come up with evidence of the first moon orbiting a planet outside of our solar system? If so, it's a stunning discovery which changes our knowledge of the universe ...

Astronomers have found nearly 250 exoplanets, but only one other star, mu Ara in the southern sky, is known to have four planets. The unique 55 Cancri system is notable because its clutch of four ...