Taking off no earlier than October 10, the spacecraft will repeatedly buzz Europa in search of water, energy and organic compounds.

All of that, plus fuel, means the spacecraft tips the scales at approximately 13,000 lbs., which requires a bruiser of a ...

Io, Jupiter's moon, continues to reveal itself. The latest images transmitted by the Juno spacecraft offer an unprecedented ...

Jupiter’s largest moons, known as the Galilean moons, are known not only for their size but for their unique features. Discovered in 1610 by Galileo Galilei, these moons—Ganymede, Callisto ...

NASA hopes to launch the Europa Clipper mission. It will then spend the next five years travelling 628.3 million kilometers ...

NASA's about to launch a huge spacecraft to a world harboring voluminous seas.

Jupiter has dozens of moons; the four largest are known as the Galilean moons. In order of their distance from Jupiter, they are the volcanic Io (which is so close that it is stretched and ...

In an image taken by Galileo in 1997, the region was barren ... Luckily, nobody is particularly close to a very big change on Jupiter’s moon Io, where a massive new volcano has been spotted ...

Astronomers have constructed telescopes of every kind - massive observatories designed to pick up faint traces of light ...

On Sept. 21, 2003, NASA's Galileo mission to Jupiter and its moons came to an end. After 14 years of exploration, the Galileo spacecraft intentionally fell into Jupiter and disintegrated in the ...

Jupiter has 95 moons and Io, which Galileo discovered through a telescope in 1610—roughly the same size as Earth's moon—is a fiery, wild place. It orbits close to Jupiter and features about ...

Comparison with Galileo spacecraft imagery of the same ... NASA's Juno probe sees active volcanic eruptions on Jupiter's volcanic moon Io (images) — Jupiter's volcanic moon Io looks ...