A hazy, ultra-light “super-puff” planet, Kepler-51d, is hiding its secrets and challenging how scientists understand planet formation.

How are the most common types of planets made? This is what a recent study published in Nature hopes to address as a team of scientists investigated the intricate processes responsible for the most ...

In the early chaos of planetary formation, before crusts cooled or atmospheres settled, water might already have been bubbling into existence. Not fromicy comets or far-flung asteroids, but from the ...