"Enceladus is a small moon that's about as wide as the state of Arizona. It is covered in water ice and reflects almost 100 percent of the sunlight that strikes it. As a result, Enceladus is one of the brightest objects in our solar system.
"This moon was first discovered in 1789. However, study of this moon didn't get really interesting until 2005, when the Cassini Science Teams made a series of dramatic discoveries."