Epimetheus, a cubicle moon of Saturn, is too small (71 miles across) for gravity to pull it into a spherical shape like Earth’s moon. It shows several more-or-less flat facets, the result, perhaps, of impacts over the eons.
NASA’s Cassini spacecraft sent back a remarkable photograph of Epimetheus. To see the photo and read more about the odd-shaped moon, visit the Baltimore Sun science blog, Science Matters.
