Earth provides no real protection for the Moon from asteroid/meteoroid impact.
I think the earth subtends something like one 15,000th of the celestial sphere
from Luna's perspective. Yes, there is a gravitational factor that improves
that a bit, but you're still talking a tiny fraction of a
NASA scientists discover unexpected mineral on Mars
NASA/Jet Propulsion Laboratory, June 22, 2016
https://www.sciencedaily.com/releases/2016/06/160622170422.htm
http://phys.org/news/2016-06-curiosity-rover-evidence-ancient-explosive.html
Richard V. Morris, David T. Vaniman, David F. Blake, Ralf
Hi Paul -
Two of the impact events are now pretty well known:
http://archaeologica.boardbot.com/viewtopic.php?f=9=3656
http://archaeologica.boardbot.com/viewtopic.php?f=9=3668
Of course, work is just beginning on the sequence of impacts for South America
and their
related meltwater pulses.
Today's Meteorite Picture of the Day: Sariçiçek TS
Contributed by: Anne Black
http://www.tucsonmeteorites.com/mpodmain.asp?DD=06/23/2016
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