Based on the composition of gases spewed by the icy space rock, researchers estimate that our guest might be up to 12 billion ...

The data obtained by Webb had two things that took researchers by surprise.

Strange interstellar comet speculated to be alien spacecraft is older than Solar System - Scientists say comet represents ...

Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

One year ago, on July 1 2025, astronomers discovered a fascinating new object moving through the Solar System. Detected by ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...

The hunt for Planet Nine continues as new discoveries make the Solar System’s biggest mystery even harder to solve. Is there ...

A rare meteorite has revealed evidence of a massive lost world that once orbited the young Sun before being destroyed in a catastrophic collision. The discovery suggests some early planets formed from ...

Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

Unlike conventional solar systems, which are hampered by the sun’s fluctuations and require backup systems to even them out, ...