Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons as well. While some TNOs could be called dwarf planets because of their ...

A waxing Moon brightens the sky as we catch our last looks at Uranus and view Venus, Mercury, Jupiter, and Mars in the sky ...

The thought of an asteroid impact is scary enough, let alone witnessing one. One such impact killed the dinosaurs 65 million years ago, and now it seems another space rock had a dramatic effect on ...

Ganymede, and Callisto. The Moon is non-luminous, meaning that it does not produce light. We see the Moon because it reflects light from the Sun, and half of the Moon’s surface is always ...

Ganymede lies to its southeast ... re back at Jupiter in Taurus this evening to watch the innermost Galilean moon, Io, now transit the disk alongside its shadow. Already coming around after ...

NASA announced that it has evidence that Jupiter’s moon Ganymede, the largest moon in our solar system, has a vast ocean lurking underneath its icy crust. WSJ's Monika Auger reports.

Towards the end of the mission, the JUICE probe dedicates its experiments in detail to the largest moon in our Solar System, Ganymede. The focus is on a suspected ocean under a kilometre-thick ice ...

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 ...

The GAnymede Laser Altimeter (GALA) for ESA's JUICE mission to Jupiter consists of two electronics units and an optical component containing the laser and the telescope for the receiver. When ...

NASA doesn't say which spacecraft recorded these weird radio emissions from Jupiter's largest moon, Ganymede, but it was likely the Galileo spacecraft (which orbited the system for about 8 years).