Something similar happened around countless other suns, the vast majority of which are thought to have planets. Astronomers are trying to figure out how exactly the planetary formation process happens ...

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 ...

All planets are made of gas, ice, rock and metal, and models of how planets form usually assume that these materials don't react chemically with each other. But what if some of them do? UCLA and ...