Scientists have known for some time that Phobos, the larger of Mars’ two small moons, is a victim of gravity, edging closer toward its parent planet.
On Wednesday, NASA's Saturn-orbiting Cassini spacecraft will take a deep but quick plunge through plumes of water vapor shooting out hundreds of miles into space from the planet’s small, ocean-bearing moon Enceladus.
A series of laboratory tests show that some terrestrial bacteria would adapt well to the salty and sulfate-rich ocean believed to exist beneath the hard icy shell of Europa.
Despite initial speculation that Pluto could be similar to Neptune's moon Triton, early data from NASA's New Horizons spacecraft shows Pluto is a different beast indeed.
The big moons of Jupiter may have oceans underground. Although they are driven by the same mechanism, their nature can be radically different.
By measuring tiny wobbles in Enceladus' orbit, scientists have figured out that Enceladus has a giant ocean.
An icy moon of Saturn hangs against the face of its giant parent planet in a breathtaking new image captured by NASA's Cassini spacecraft.
You'll probably hear a lot about a 'supermoon' over the next few months. This is not a term that astronomers use, but here are some facts about what will actually happen.
+ Load More