A ghostly apparition has long been known to follow Saturn moon Enceladus in its orbit around the gas giant. But until now, scientists have had a hard time tracking its source.
NASA's Cassini mission has spotted a small Saturn moon illuminated by reflected sunlight off Saturn's atmosphere.
The primordial planet believed to have smashed into baby Earth, creating a cloud of debris that eventually formed into the moon, was chemically a near-match to Earth.
Though all of Saturn's moons have some curious quirks, Iapetus is probably the strangest of the Saturnian family of satellites.
You're not seeing double; these are two images of the same world: icy, cratered Rhea, the second-largest natural satellite of Saturn.
Our solar systems moons keep showing evidence for liquid water. These exciting discoveries have scientists re-examining how we should look for life "out there," and where we should look.
A NASA spacecraft speeding toward an epic flyby of Pluto on July 14 has beamed home its first good looks at two moons of the dwarf planet.
The space telescope has captured the moments when three of the Galilean satellites crossed the face of Jupiter.
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