[meteorite-list] Repost: PLANETS, PART THREE, Sort of...

From: Dawn & Gerald Flaherty <grf2_at_meteoritecentral.com>
Date: Wed Aug 3 11:00:17 2005
Message-ID: <031c01c5983b$eff06a10$6502a8c0_at_GerryLaptop>

COOL!
----- Original Message -----
From: "Sterling K. Webb" <kelly_at_bhil.com>
To: "Meteorite Mailing List" <meteorite-list_at_meteoritecentral.com>
Sent: Wednesday, August 03, 2005 5:18 AM
Subject: [meteorite-list] Repost: PLANETS, PART THREE, Sort of...


> Hi, Everybody!
>
> I said:
>
> Notice the logical completeness of this three-fold definition. It
> is, when stripped bare, essentially this:
> 1) ALL rock,
> 2) ALL volatiles, and
> 3) significant admixtures of rock AND volatiles (half and half or
> whatever it happens to be).
>
> Of course, the volatiles in Plutonian planets are almost entirely in
> the form of solids. More than solids, minerals. Most is water ice.
>
> Water ice we think we know, but we don't. We only know Ice I, weak
> pitiful stuff, quite ephemeral. There is Ice II through Ice IX.
>
> Each Ice has radically different properties from Ice I and from each
> other, different densities, melting and boiling points, atomic
> structure. Each is a remarkable substance, unlike anything ever seen on
> Earth.
>
> Many of the Ice states are very hard to create in the laboratory and
> then only under extreme conditions. Not all of them have been created
> successfully. In theory, metallic Ice is possible, but has never been
> observed.
>
> The interior dynamics of Plutonian planets, especially large ones,
> are probably dominated by the unknown mechanisms and properties of the
> various physical states of Ice. A complete phase diagram of Ice, in all
> is forms, is not even fully known, but what portions of one that we do
> have is suggestive of tremendously complicated internals for a Plutonian
> planet.
>
> And of course, Plutonian planets are only possible where they do in
> fact exist, in the coldest parts of the solar system where large-body
> Ice dynamics is possible.
>
>
> Sterling K. Webb
> --------------------------------------
>
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Received on Wed 03 Aug 2005 10:59:23 AM PDT