Observations made possible by NASA's Saturn-probing Cassini spacecraft led to the discovery that a vast liquid ocean is teeming beneath the icy exterior of Mimas. "Its heavily cratered surface ...

There is no surface below. Saturn's made almost entirely of hydrogen and helium gas, which is why it's called a gas giant. 4,000 kilometers above the surface, we hit Saturn's upper atmosphere.

Their reasoning was simple: Mimas’ heavily cratered surface showed no signs of an internal ocean. As with Enceladus, Saturn’s gravity should churn the ocean waters within Mimas, causing large ...

Twenty years ago today, I watched TV coverage of a probe descending toward the surface of Titan, a moon of Saturn, while outside my home in Utah snow dusted a rocky mountain outcrop I’d ...

Oct. 25, 2024 — A new study has revealed that methane gas may be trapped within the icy surface of Saturn's moon Titan, forming a distinct crust up to six miles thick, which warms the underlying ...

Since then, Cassini has been transmitting dozens of images of Saturn's surface. Here, NASA has compiled all the images into one, incredible video that reveals exactly what Cassini saw. One of the ...

Opinions expressed by Forbes Contributors are their own. Jamie Carter is an award-winning reporter who covers the night sky. Planetary scientists don’t care about Mimas, Saturn’s smallest moon.

Twenty years ago today, I watched TV coverage of a probe descending toward the surface of Titan, a moon of Saturn, while outside my home in Utah snow dusted a rocky mountain outcrop I’d ...