**The impact occurs at the bottom of the screen**On Sept. 11, 2013, an asteroid hit the Moon. That happens all the time, but most of the cosmic debris is tiny, far too small to detect from the Earth.But this one was different. Roughly a meter across and moving at interplanetary speeds when it slammed into the lunar surface, it created the brightest explosion ever seen on the Moon! The whole thing was captured on video:For full article go here: www.slate.com/blogs/bad_astronomy/2014/02/24/lunar_impact_vi