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Re: Meteor increase worries scientists
- To: meteorite-list@meteoritecentral.com
- Subject: Re: Meteor increase worries scientists
- From: Jarmo Korteniemi <eltanin@rocketmail.com>
- Date: Sat, 21 Feb 1998 02:12:16 -0800 (PST)
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- Resent-Date: Sat, 21 Feb 1998 05:08:37 -0500 (EST)
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I for one do not agree with the theory of 30 million years, since it
still needs some adjustment. The Galactic disk we pass through every
30 million years isn't actually a solid plane, is it? And the
amplitude the Sun has moving up and down isn't actually very big, thus
the Sun isn't in and out of the disk... as I understand, we are pretty
much in the disk all the time, just passing through some more dense
areas from time to time. So the number of extra particles from the
Oort cloud falling down on the Sun (and on Earth) must be only a few
meteoroids here and there...?
And since the Sun circles around the galactic core also, we pass
occasionally a spiral arm of the galaxy... as I understand, it has
much more stuff in it than what we have around us now, between the
spiral arms.
So, if this theory were true, we should have some more meteorites
falling on us every time we pass through the disk and MUCH MUCH more
when we pass through the spiral arms. And we do not have much evidence
to suggest that, or do we? And evidence should show also that the
other planets have had an extra load of meteors falling on them also,
shouldn't it..?
It's just my opinion... right out of the blue. Feel free to comment.
An article was written about the sublect and can be found at
http://xxx.sissa.it/abs/astro-ph/?9802174
===
/\_./o__ If you doubt anything stated in this message,
(/^/(_^^' please reply and I will consider your point of
._.(_.)_ view... for about two seconds. =)
I'm out of here. Jarmo Korteniemi
Bye for now. email: eltanin@rocketmail.com
phone: FI-(0)8-556 11 42
Sacred cows make the best hamburger.
-- Mark Twain
---Gene Roberts wrote:
>
> Hello all,
>
> Regarding the perception of an increase in bolide sightings, it may
or may not
> be factual and it may or may not be significant. There is such a
thing as
> random clustering and this list has contributed to everyone's
awareness of
> incidents. Only time will tell.
>
> If you want something to ponder, consider this: Michael Ramphino,
who, at
> least in part, discovered the possible 30 million year cycle of
major impacts
> has an excellent article in the current Planetary Report from The
Planetary
> Society. In the article he points out that one possible cause for
the cycle is
> the solar system moving up and down through the galactic lens as it
rotates
> around the Milky Way, which causes large cometary objects in the
Oort cloud to
> be perturbed inward towards the sun. IF all this theory and
speculation were
> true, the solar system has "just" passed through the lens a few
million years
> ago, and all those perturbed cometary objects would be showing up
right about
> now (give or take a few hundreds of thousands of years).
>
> It's all theory, of course, but it's interesting timing in terms of
species
> development.
>
> Gene
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