An Interesting Video, Part 2:
A Facelift for the Moon every 81,000 years. Scientists find 180 new impact craters each year, their creation causing a turnover of lunar surface 100 times faster than predicted. The Moon is bombarded by so much space rock that its surface gets a complete facelift every 81,000 years, according to a study released Wednesday based on NASA data. This churn — affecting the top two centimeters (nearly an inch) of mostly loose moon dust — happens 100 times more frequently than previously thought, scientists reported. The study also estimates that asteroids and comets crashing into Earth’s only natural satellite create, on average, 180 new craters at least 10 meters (33 feet) in diameter every year. (More at link above; orig. article on The Guardian)
And Reb Menachem (absolute truth) writes about the Debris Field around the Moon.