space weathering: A brand new term for the English language. From this article on the new moon-formed mineral recently discovered:

>Benton C. Clark, a weathering expert at Lockheed Martin Corp., said the process of forming the moon mineral seems plausible, but stressed that it needs to be defined as "space weathering," which would be unlike weathering on Earth.<

http://www.cnn.com/2004/TECH/space/04/26/bc.moonmineral.ap/index.html