A thick layer of haze around the ultra-low-density planet Kepler-51d likely obscures not only the strange planet's ...

The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy known as the Hubble tension.

Astronomers have discovered a bizarre exoplanet with a giant underground ocean of magma that traps sulphur and may represent an entirely new class of worlds.