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

[Dawn & Gerald Flaherty]

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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