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 ...

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

Recent research suggests a warp in the orbital plane of Trans-Neptunian Objects (TNOs) between 80 and 400 AU, hinting at the ...

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

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

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

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 ...