Artwork: Uranus and its five largest moons had been thought to be inactive and sterile. The planet Uranus and its five biggest moons may not be the dead sterile worlds that scientists have long ...

Since he returned from his doctorate in France, in 1982, the Brazilian astronomer has been continuously registering the celestial revolutions of Uranus and its five largest moons: Miranda, Ariel, ...

If Uranus's moons are found to have interior oceans ... than those that are solid all the way through. However, even the largest oceans will generate only a slight wobble: A moon's rotation ...

Uranus has always been an intriguing planet ... Further, Saturn’s tilt may also be tied to the migration of its largest moon, Titan. This isn’t an unusual circumstance, either.

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...