A Meteoroid Hits the Moon

There's a new crater on the Moon. NASA astronomers watched it form: "On May 2, 2006, a meteoroid hit the Moon with 17 billion joules of kinetic energy—that's about the same as 4 tons of TNT," says Bill Cooke, the head of NASA's Meteoroid Environment Office in Huntsville, AL. "The impact created a bright fireball which we video-recorded using a 10-inch telescope."
Lunar impacts have been seen before--"stuff hits the Moon all the time," notes Cooke--but this is the best-ever recording of an explosion in progress. (See it here)