The Lunar and Planetary Science Conference announced on 2015-03-16 that a 198 km wide crater has been found on the moon using the GRAIL spacecraft that uses gravitational field mapping. This enabled the discovery of craters below the surface. It's been named the Earhart crater. Nice gravitational photos can be found in the links.
(Score: 3, Insightful) by DeathMonkey on Friday March 20 2015, @05:35PM
Can a Canyon not be Grand, then?