EP,
All the theories in the world added together do not amount to one
fact.
But since we do not have ANY facts about the impact
rates on the Moon (or Mars or Tital or Ganymede or
anywhere at all and only inferential data for our own
home planet), the sum accumulation of facts is... ZERO.
We ain't got one fact.
And the contribution of reason / inference from
known quantities amount to considerably more
than zero.
Am I not the the one who is always saying, about
endless speculation about the geology of Mars or
asteroids, that we will never know until we have
"boots on the ground," 100 geologists on Mars-suits,
carrying those funny little hammers, and scooting
around in monofuel Humvees, living in solar tents?
Until then...
Sterling K. Webb
----------------------------------------------------------------------------
----- Original Message -----
From: "E.P. Grondine" <epgrond...@yahoo.com>
To: <meteorite-list@meteoritecentral.com>
Sent: Sunday, July 03, 2011 6:55 PM
Subject: [meteorite-list] Moon/Earth impact rates
Hi Sterling -
Usually, you are spot on, but in this case...
In fact, no one knows if the Earth sweeps stuff up for the Moon, or
the Moon pulls in more stuff that hits the Earth. NASA's garbage
estimates for ELEs are a perfect example of how bad their "modeled"
impact estimates are; NASA's estimated human ELE rates are even
worse - they appear to be off by two orders of magnitude.
Earth impact rates need to be determined from Earth data. Then a more
general model may be worked out, using accretion data from all bodies
in our solar system.
All the theories in the world added together do not amount to one
fact.
As far as the effects of hyper-velocity dust goes, I seem to recall
parts of Surveyor being examined after lunar surface exposure.
all the best,
E.P. Grondine
Man and Impact in the Americas
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