IZ Reloaded writes "NASA's Meteoroid Environment Group monitored the night side of the Moon in Nov. 2005 and in 107 hours of observing, they tallied 20 lunar meteors + at least 60 Earth-orbiting satellites + one airplane + one terrestrial meteor = 82 in all. From the press release (with cool videos): This is the first systematic count of lunar night-side phenomena. "It gives astronomers an idea of what to expect when they undertake a lunar monitoring program from Earth." Cooke's prime target is lunar meteors — flashes of light that occur when meteoroids hit the Moon's surface. "Of the 20 lunar meteors we've seen so far, about half come from well-known meteor showers such as the Leonids and Geminids. The other half are random meteoroids that take us completely by surprise." NASA is preparing to send astronauts back to the Moon and the agency is understandably interested in how often this happens."