Boulder-size object hit moon creating explosion 10 times brighter than anything NASA has seen before

On March 17, 2013, an object the size of a large boulder, crashed into the surface of the moon. The resulting flash of light was 10 times greater than any recorded direct-moon hit to date and in fact was so bright, it was visible by the naked eye from Earth. Scientists at NASA explained that...
Boulder-size object hit moon creating explosion 10 times brighter than anything NASA has seen before