A new study based on newly received data from the Cassini spacecraft revealed that the moons orbiting the ringed planet Saturn could be younger than previously thought.
Astronomers reexamining data from Voyager 2 has observed evidence indicating the existence of two tiny, never-before-seen moons lurking within the dark rings of Uranus.
After Mars' larger moon Phobos is shattered by gravity, Mars will likely have an all-new appearance.
For several years, scientists have believed that the Solar System formerly had five, not four gassy giants. They wondered how the fifth planet was tossed out. New research explains how it likely happened.