Uranus

A cold, blue-green ice giant planet tipped nearly sideways on its axis, with a set of narrow rings and a family of at least 27 moons named after literary characters.

Launched in 1999, Stardust became the first spacecraft to collect samples of a comet's coma, gathering material from Wild 2 in 2004 and successfully returning the samples to Earth in 2006.

Oberon

The outermost of Uranus's major moons, Oberon is a heavily cratered, icy body marked by dark patches of material and deep impact basins with mountain peaks that rise up to 6 kilometers above the surface.