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

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

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

NASA Juno mission captured amazing new imagery of Jupiter's moon Europa. The spacecraft flew about 219 miles (352 kilometers) over the surface of the moon. Credit: Space.com | imagery credit: Credit : ...

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

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

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

NASA Associate Administrator Jim Free announced Wednesday his retirement, effective Saturday, Feb. 22. As associate ...

Scientists explore Lost City, in the Atlantic, where chemical reactions in hydrothermal vents could explain the origin of ...

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.

Official portrait of NASA Associate Administrator Jim Free, taken on Nov. 22, 2024, at the agency's headquarters in ...

Saturn’s rings are an arresting sight even through modest telescopes. The planet is made mostly of hydrogen and helium whereas the rings are billions of pieces of mostly bright-white water ice and ...