Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

The most important aspect of this is that, with a possible atmosphere and liquid water, this planet lies within the habitable ...

When Kate Middleton handled a small piece of rock at London’s Natural History Museum she became one of the few people on ...

Two of NASA’s longest-running space missions, Voyager 1 and Voyager 2, have detected a searing-hot region of space where the ...

Hubble identified the largest known protoplanetary disk, revealing a turbulent, chaotic environment with material extending ...

Editorial: Over the holiday period, the Guardian leader column is looking ahead at the themes of 2026. Today we look skyward, where a new lunar contest mirrors humanity’s struggle to live within plane ...

James Webb observations detect warm carbon monoxide gas in the inner disk of HD 131488, revealing non-equilibrium conditions and evidence of exocomet-driven gas replenishment near the star.

Scientists using the James Webb telescope observed a distant exoplanet with an atmosphere of soot and diamonds, challenging ...

Astronomers discovered a new moon of Uranus and hundreds of moons around Saturn over the past year, and there may be many ...

For only the second time ever, a collision between two asteroids has been observed around an alien star not too far beyond ...

Across the Milky Way and beyond, planetary systems appear to fall into a few recurring blueprints, and recent exoplanet ...