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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! |
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There is no answer at this time. |
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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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