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Q: Planet's surface ( No Answer,   3 Comments )
Question  
Subject: Planet's surface
Category: Science > Astronomy
Asked by: sloaner012-ga
List Price: $7.00
Posted: 07 Oct 2004 12:07 PDT
Expires: 14 Oct 2004 20:32 PDT
Question ID: 411636
I need to know if someone could lace the terrestrial planets surfaces
( and our Moon) in order on a list from MOST like the original planet
surface to LEAST like the original planet surface. Thanks!
Answer  
There is no answer at this time.

Comments  
Subject: Re: Planet's surface
From: guzzi-ga on 07 Oct 2004 16:15 PDT
 
There is only one ?terrestrial? planet. Don?t quite follow the
question. Do you mean how much have solar system body surfaces evolved
(or not) away from their original form 4.5 billion years ago -- listed
by degree?
Subject: Re: Planet's surface
From: neilzero-ga on 07 Oct 2004 16:20 PDT
 
My guess is: 25 % of the astronomy professionals would refuse to play
this game unless offered a large bribe. 24 % would say the moon is
most changed as the top opinion is the moon is mostly material torn
off Earth, by the impact of a Mars size object. Earth would 2nd from
most changed 23% Mars 3d from most changed, 22 % mostly because the
atmosphere changed radically which changed the chemistry of the
surface of Mars. Venus least changed 21 % as it likely has had the
same very thick atmosphere for more than 4 billion years. Pluto would
be rated 2nd or least by 12% Most of the rest would not accept Pluto
as a terrestral planet, including a few who do not accept Pluto as any
kind of a planet. Mercury would be rated near the middle to most
changed by most astronomy professionals, as it is believed by some
that it's outer surface was torn away by some process because Mercury
has a proportionally large core.
 A dozen other arrangement would be the choice of about 1% each
including some I have not heard, nor supposed.   Neil
Subject: Re: Planet's surface
From: iang-ga on 08 Oct 2004 03:26 PDT
 
Venus would be top of my list since it resurfaces itself from time to
time. The exact mechanism isn't known, but try searching for "Venus"
and "resurface".  I'm not sure that the character of the surface
changes much though, so you could argue it the other way round i.e.
although it's a new surface it looks much the same as the old one.

If character is the issue I'd go for Earth - other planets may have
techtonic activity and / or weather, but we've got both, as well as
life.

Ian G.

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