In article
,
BradGuth wrote:

On Mar 17, 9:14 am, "a425couple" wrote:
"Matt Giwer" wrote

Timberwoof wrote:
BradGuth wrote:
The early or proto-human species as of during and then shortly after
the very last ice-age this Earth w/moon is ever going to see,
Hm. And your evidence for this is what, exactly?
On sci.astro.seti Brad is our comic relief. Posting to him is wasted. He
is
impervious to reason and physics.

Thanks Matt, got kinda interested, read wikipedia - moon, then Cruithne,
then Lilith. Interesting side-bar quote, "Due to the many readily apparent
holes in Lilith's supportive argument (not least of which is her general
defiance of the laws of gravity) the actual physical existence of this
astronomical object is believed only by fringe groups comparable to the Flat
Earth Society."

To BradGuth, seems to my unschooled in this area logic,
that the biggest flaw in your thoughts comes from fact,
"The Moon is in synchronous rotation, meaning that it keeps nearly the same
face turned towards the Earth at all times. Early in the Moon's history, its
rotation slowed and became locked in this configuration as a result of
frictional effects associated with tidal deformations caused by the Earth."
That would probably take a REAL considerable time -
i.e. much over 13,000 years.
Unless of course, it was just created then and there,
almost exactly as we now observe it to be.

Venus as it passes extremely close by every 19 months, as such is
nearly as moon like tidal locked to Earth. So what's your point?

"extremely close"? Look, orbital mechanics has no room for wishy-washy
nonmathematical, qualitative analysis. The *only* way that you can make
any sense out of orbits is to provide concrete numbers with which people
can do calculations.

Simple examples: The moon at its farthest is closer than Venus at its
closest. So how do you say that the moon is closer than extremely close?
Mars at its closest is closer than Venus at its farthest. How do you say
that? Pretty far and really far? And Jupiter is really really far, but
Saturn is extremely far? Without numbers, it's all useless.

What exactly do you not understand about a lithobraking encounter of
an icy proto-moon (be it complex)?

The part about how there's no scar on the Earth and how the Earth's
surface is a lot older than 12,000 years.

While you're at it; do tell us where that terrific arctic ocean basin
came from?

It's not all that terrific. It just doesn't have any continental crust
in it. Just like the other oceans. Certainly not from the moon hitting
it and ending up in a circular equatorial orbit.

How about telling us when Earth got the vast majority of its seasonal
tilt?

Probably when a Mars-size planet hit the Proto-Earth sometime after the
Iron Catastrophe, early in the formation of the solar system. (BTW, most
of that planet is not in orbit around the Earth.)

--
Timberwoof me at timberwoof dot com http://www.timberwoof.com
"When you post sewage, don't blame others for
emptying chamber pots in your direction." ‹Chris L.