Re: Searching for Theia, the mother of the Moon

On Apr 21, 3:11 pm, Yousuf Khan <bbb...@xxxxxxxxx> wrote:
N:dlzc D:aol T:com (dlzc) wrote:

"YKhan" <yjk...@xxxxxxxxx> wrote in message
There must be something powering the Earth's
dynamo. Large uranium deposits inside the
Earth's iron core keeping it hot and spinning.
The question is why Venus didn't have a
similar power source?

Is the dynamo, Theia?

Maybe the Gaians are right? Maybe the Earth itself is a living organism?
The Gaians only go so far as to say that the Earth's upper crust is
living, but maybe it goes even further than that, and the whole planet
is living?

Simple physics alone isn't explaining the big differences we see between
Earth and the rest of the planets. From your link below, Earth is the
densest planet in the solar system, but only slightly more so than
Mercury or Venus. So density alone isn't an explanation for the dynamo
at the heart of the Earth. Of the three densest planets two have a
dynamo, and one doesn't. The 4 least dense planets, the gas giants, all
have magnetic fields, but that's just because they are gaseous, which
allows a lot of layers to move independent of each other, creating the
magnetic fields. So simple physics explains the gas giants' magnetic fields.

Maybe that's as dense as terrestrial planets get,
if they don't have a big iron core in their centers?
The Moon and Mars don't have a big iron core,
but the Earth does. What's Venus's density?

http://nssdc.gsfc.nasa.gov/planetary/fact***/index.html
... slightly less than Earth, as is Mercury.

I bet it's pretty close to Earth's too. Mercury is
apparently the most dense planet in the solar
system, because it's nearly entirely iron.

No, we are.

So we are, I had heard somewhere that Mercury was the densest.

I found a link:
http://news.uchicago.edu/news.php?asset_id=1537
Was it always as sparse as it is now? 2300 ly seems
a long way to send dust.

Okay, but what has it got to do with dust around our
own solar system? They don't mention any link to
our solar system.

We are constantly bombarded with dust.  We never knew where it
could have come from.  Now we know a(nother) mechanism.

Is this considered the nearest dust source? I'm certain there are plenty
of much nearer dust clouds than this around.

                Yousuf Khan

Perhaps our Eden/Earth came from the impressive Sirius B solar system.

You do know that Sirius B is not a very old star, and that it only
recently went red giant before ending up as a white dwarf. Do you
understand the implications?

~ BG
.

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