More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, ...

Callisto, the third largest moon in the entire solar system, orbits Jupiter from about 1.2 million miles away. The rocky ...

NASA’s Galileo spacecraft, which was designed to study the large, gaseous planet Jupiter and its moons, first caught hints of ...

Research Fellow Dr. Babak Bakhit has encountered one of his most challenging projects to date—contributing to the European ...

The presence of an ocean leaves open the possibility that it could host life. Another nearby moon, Europa, is also considered ...

Callisto, one of Jupiter’s largest moons, looks like a boring, crater-filled world. It doesn’t seem to have much going on ...

Your guide to the Giant Red Spot, those large ocean-bearing moons and the conditions which could support life on the planet ...

ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

Plus: Stopping asteroids from hitting Earth, solving climate change with fertilizer and building strength by eating grapes.

Two planets stand side by side as the evening twilight continues to delight and colorful stars shine in the sky this week.

The Sun is slowly setting, it is a beautiful clear sky, and I am in the northern Prague district of Ďáblice inside a long wooded park called Ďáblický háj, which is approximately 60 hectares in size.

You shouldn't set your expectations too high, but it will give you enough of a taste to see whether you want to invest in ...