But it wasn't until NASA's Galileo spacecraft approached the Jovian system in December 1995 that the gas giant finally had a guest stay for any significant length of time. Galileo was the first spacecraft to orbit Jupiter and made substantial discoveries about the gas giant and its moons. T...
reflecting over a third of the light that strikes its surface. It takes its name from Pope's poem and also from a character in Shakespeare's "The Tempest." Ariel appears to have a surface that is the youngest of the moons of Uranus. This is because, according to NASA, it has just a...