Have you ever wondered why all the planets in our solar system– whether it’s rocky Earth or massive Jupiter– are round? It’s ...

rock and dust. Uranus and Neptune come next. Whilst unmanned spacecraft have approached the gas planets, actual landings are not possible because of the lack of solid surfaces. The gas planets are ...

What if water and hydrogen don’t stay separated inside planets like Earth and Neptune? New research from UCLA and Princeton ...

All planets are made of gas, ice, rock and metal, and models of how planets form usually assume that these materials don't ...

What if the insides of planets are more complicated than we thought? A new study from scientists at UCLA and Princeton suggests that hydrogen and water, two common ingredients in planets, can mix in ...

It grew larger thanks to countless collisions between dust particles, asteroids, and other growing planets, including one last giant impact that threw enough rock, gas, and dust into space to form the ...