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

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

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

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

Oh, we humans do love a cleanly defined boundary, don’t we? They make things easier, after all. If we’re trying to categorize something, knowing what labeled bin to put it in is handy. If we’re ...

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

Spiral Galaxy from Kirkland et al. CREDIT Chris Kirkland and colleagues. A new study of zircon crystals from two of Earth’s oldest continents indicates that the formation of Earth’s continental crust ...

Add Yahoo as a preferred source to see more of our stories on Google. Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky ...

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 is a smashing success. A new study suggests that from its earliest period — even before the last of its nebular gas had been consumed — Earth’s solar system and its planets looked ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming into view, revealing hints of a surprising past – and the origin of Saturn's ...