Sittin' On the Dock of the Bay NASA has released stunning new artist impressions of an extremely reflective lava lake on the ...

A quick guide to Jupiter, which is immense and the largest of all the planets. It is liquid in form and has many moons, the largest of which, Ganymede, is bigger than Mercury. NOTE: This clip was ...

Jupiter has more mass than Earth, so its gravity is two and a half times greater. Pluto is much smaller than Earth and so the force of gravity on Pluto is weaker than it is on Earth. This clip ...