Saturn's "Walnut" Moon Mystery Cracked?
Thursday, October 14, 2010 - 17:00
in Astronomy & Space
Saturn's moon Iapetus spun unusually fast in its youth, creating the eight-mile-high ridge around its middle, scientists suggest.
Saturn's moon Iapetus spun unusually fast in its youth, creating the eight-mile-high ridge around its middle, scientists suggest.