The Solar System is far more diverse in size than it appears from Earth. From tiny rocky worlds to massive gas giants, each ...

The planets are extremely large, with TOI-791 b being about the same size as Jupiter, and TOI-791 c even larger. Yet, they ...

The solar system’s history is steeped in mystery, with suggestions of ancient chaos possibly casting out enormous planets. Uranus's rugged moons are now seen as vital artifacts that could unravel this ...

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

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 ...

Before the Voyager 2 flyby of Uranus and Neptune, these two distant planets were thought to be cold, dead worlds on the outskirts of the solar system. The historic spacecraft visit, however, revealed ...

A pair of sibling gas giants originally spotted by citizen scientists are so lightweight that their density resembles wispy ...

What happens when a planetary system refuses to follow the usual script? Astronomers say they have found exactly that around LHS 1903, a small red dwarf about 116 light-years from Earth, where four ...

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 ...