Scientists estimate there are ~1 septillion (1 followed by 24 zeros) planets in the observable universe. This figure is based ...

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

Saturn's icy moon Enceladus has long been ... geysers come from a vast — potentially habitable — underground ocean. Liquid from the ocean, scientists believed, could be escaping through ...

Wondering what there is to love about Jupiter? The Jovian giant has many reasons that are worthy of your affection, whether ...

Evidence is increasing that liquid water and other building ... with rock at the bottom of the ocean of Saturn's icy moon Enceladus, producing hydrogen gas. Credit: NASA/JPL-Caltech Cassini ...

If you could ever reach the core of the planet (which is believed to be composed mainly of rock and even metallic hydrogen), the ... and may also have a liquid water ocean. The other moons are ...

Hycean worlds, which are a possible kind of exoplanet with deep oceans surrounded by a thick envelope of hydrogen, could ...

You thought Saturn's 146 moons were impressive? Think again. The ringed planet's moon count has nearly doubled with the official recognition of 128 new Saturnian moons, bringing its total to an ...