A team of researchers has demonstrated a new way in which sub-Neptune-sized exoplanets could produce a great deal of water.

Water isn't just delivered to planets by comets and asteroids — it can also be forged as worlds form, a new study finds.

What happens when a planet contains immense quantities of water but is far too hot for that water to remain liquid?

In the swirling clouds of gas and dust that surround newborn stars, planets begin to form. These planet-forming disks are rich with clues about how worlds like Earth come to be. Until now, scientists ...

A key method of forming planets finally has observational evidence, thanks to a network of radio telescopes in the U.K. that have resolved the existence of a huge abundance of centimeter-sized pebbles ...

For decades, scientists have studied how planets form by looking at young stars nearby, assuming that these environments could be representative of all star systems. However, as astronomers discover ...

Scientists have identified three Earth-sized planets orbiting two stars in the TOI-2267 system. Remarkably, planets transit ...

A new space telescope with Irish scientific involvement goes into operation this week on a mission to study how stars behave ...

By measuring iron isotopes in Moon rocks and meteorites, researchers determined Theia probably formed closer to the Sun than ...

Theia' is a long-vanished world, a planet-sized body thought to have smashed into the early Earth and that helped to form the moon.

JWST infrared technology pierces cosmic dust with unmatched clarity, revealing hidden star nurseries and structures no ...