A colossal asteroid, estimated to be 20 times larger than the one that led to the extinction of the dinosaurs on Earth, has left a permanent mark on Jupiter’s largest moon, Ganymede. This ...

Galileo never saw Ganymede, Jupiters largest moon, but this NASA video shows the moon orbiting behind Jupiter in just two hours National Treasure: The History of the Lie Detector The Incredible ...

Jupiter's largest moon Ganymede is generating "killer" waves of electrons that astronomers say could damage spacecraft going on future missions. These electromagnetic waves can be found all around ...