Inside the cores of ice giant planets, the pressure and temperature are so extreme that the water residing there transitions into a phase completely unfamiliar under natural conditions on Earth.

At extreme pressures and temperatures, water becomes superionic — a solid that behaves partly like a liquid and conducts ...

Far beyond Neptune lies a vast and unsettling frontier filled with dwarf planets, ancient ice worlds, collapsing atmospheres, ...

"The combination of extreme disk size, strong asymmetries, winds, and potential planet formation makes it the perfect ...

Photoshop CS5 tutorial showing how to create a gaseous planet like Jupiter floating in deep space.

Astronomers discovered Gomez’s Hamburger, a massive protoplanetary disk. Edge-on view shows dust and gas layers with clumps ...

The giant protoplanetary disk offers clues to how gas and dust organize themselves around a star to form planets.

Under extreme planetary conditions, water turns into a strange, electricity-conducting solid hidden deep inside giant planets.

"In our solar system, the most massive moon is Ganymede, which is still extremely small compared to what we are inferring ...

Planetary rings explained: composition, formation theories, and a comparison of Saturn, Jupiter, Uranus, and Neptune’s rings.

"I don't think anyone's made this connection between the surface fluid pattern and the interior properties of these planets." ...

A new discovery suggests the possibility of an exomoon with an unprecedentedly large mass, thousands of times larger than any ...