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.
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.
The ringed planet might have a longer day than originally calculated.
Jupiter's early migration through the inner solar system caused gravitational mayhem, but it ultimately settled to allow Earth to form in a relatively quiet neighborhood.
Saturn's icy moon Enceladus is showing definite signs of hydrothermal activity -- similar activity that is found along deep sea vents on Earth where water is heated and minerals are formed.
Chemical engineers have created a theoretical model of a type of alien cell that might be able to support life on Titan.
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