Solar System, Moon | featured news

The Cassini Solstice mission has discovered what appears to be a miniature version of the Nile River on Saturn's largest moon, Titan. In comparison, the Nile is 4,132 miles long. The 250-mile long feature -- from 'headwaters' to a large sea -- is the longest extraterrestrial river ever to be discovered and imaged to such high resolution.

Neptune may have polished off a super-Earth that once roamed the outer solar system and stolen its moon to boot. The brutal deed could explain mysterious heat radiating from the icy planet and the odd orbit of its moon Triton.

Astronomers have found the strongest evidence yet for an ocean beneath the icy shell of Saturn's Enceladus, suggesting it could join the exclusive club of watery moons in our solar system.