|
The lunar meteor impact survey which only started in 2006 has recorded dozens of surface impact fireballs that we could see from 240,000 miles away.
But the satellite doesn't monitor the moon 24 hours a day.
So there are lots of impacts not seen because the satellite is not pointed at the moon or aren't bright enough to register as hits.
So I doubt it takes millions of years to turn over the dust.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
|