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Science Fiction > Science > Re: planetary a...
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Re: planetary and atmospheric rotation - origins, direction, etc

by Tim Little <tim@[EMAIL PROTECTED] > Feb 29, 2008 at 07:23 AM

On 2008-02-29, Larry Caldwell <firstnamelastinitial@[EMAIL PROTECTED]
> wrote:
> If Venus underwent such a massive collision, where is the debris?
> Venus should have one or more moons accreted from the debris.

Slowly rotating planets are very unlikely to have moons.  If a moon
orbits faster than the planet, then tidal effects act to decelerate
it.  If there was a moon or debris ring, it would long ago have been
decelerated and re-impacted.

E.g. Phobos will impact Mars within less than 100 million years,
because it is orbiting faster than Mars rotates.


- Tim




 30 Posts in Topic:
planetary and atmospheric rotation - origins, direction, etc
 Tux Wonder-Dog <wes.pa  2008-02-27 21:54:43 
Re: planetary and atmospheric rotation - origins, direction, etc
 Simon Morden <simon.mo  2008-02-27 11:29:28 
Re: planetary and atmospheric rotation - origins, direction, etc
 Tux Wonder-Dog <wes.pa  2008-02-29 01:44:42 
Re: planetary and atmospheric rotation - origins, direction, etc
 Crown-Horned Snorkack <  2008-02-28 12:34:10 
Re: planetary and atmospheric rotation - origins, direction, etc
 Crown-Horned Snorkack <  2008-02-28 13:31:26 
Re: planetary and atmospheric rotation - origins, direction, etc
 Brian Davis <brdavis@[  2008-02-29 05:49:28 
Re: planetary and atmospheric rotation - origins, direction, etc
 Zombie Elvis <DELETEME  2008-02-28 02:45:34 
Re: planetary and atmospheric rotation - origins, direction, etc
 Larry Caldwell <firstn  2008-02-28 19:35:22 
Re: planetary and atmospheric rotation - origins, direction, etc
 Zombie Elvis <DELETEME  2008-02-28 22:32:34 
Re: planetary and atmospheric rotation - origins, direction, etc
 Erik Max Francis <max@  2008-02-28 20:38:37 
Re: planetary and atmospheric rotation - origins, direction, etc
 Zombie Elvis <DELETEME  2008-03-01 00:00:05 
Re: planetary and atmospheric rotation - origins, direction, etc
 Tim Little <tim@[EMAIL  2008-02-29 07:23:29 
Re: planetary and atmospheric rotation - origins, direction, etc
 af250@[EMAIL PROTECTED]   2008-02-29 13:17:15 
Re: planetary and atmospheric rotation - origins, direction, etc
 Brian Davis <brdavis@[  2008-02-29 05:32:10 
Re: planetary and atmospheric rotation - origins, direction, etc
 Brian Davis <brdavis@[  2008-02-29 05:37:29 
Re: planetary and atmospheric rotation - origins, direction, etc
 af250@[EMAIL PROTECTED]   2008-03-02 06:22:21 
Re: planetary and atmospheric rotation - origins, direction, etc
 throopw@[EMAIL PROTECTED]  2008-02-28 20:43:05 
Re: planetary and atmospheric rotation - origins, direction, etc
 throopw@[EMAIL PROTECTED]  2008-02-28 20:48:20 
Re: planetary and atmospheric rotation - origins, direction, etc
 throopw@[EMAIL PROTECTED]  2008-02-28 21:37:06 
Re: planetary and atmospheric rotation - origins, direction, etc
 Tim Little <tim@[EMAIL  2008-02-29 02:27:17 
Re: planetary and atmospheric rotation - origins, direction, etc
 throopw@[EMAIL PROTECTED]  2008-02-29 04:25:25 
Re: planetary and atmospheric rotation - origins, direction, etc
 Tim Little <tim@[EMAIL  2008-02-29 07:05:48 
Re: planetary and atmospheric rotation - origins, direction, etc
 Erik Max Francis <max@  2008-02-29 00:22:37 
Re: planetary and atmospheric rotation - origins, direction, etc
 throopw@[EMAIL PROTECTED]  2008-02-29 08:07:52 
Re: planetary and atmospheric rotation - origins, direction, etc
 Tim Little <tim@[EMAIL  2008-02-29 12:26:23 
Re: planetary and atmospheric rotation - origins, direction, etc
 throopw@[EMAIL PROTECTED]  2008-02-29 08:24:40 
Re: planetary and atmospheric rotation - origins, direction, etc
 Brian Davis <brdavis@[  2008-02-29 05:46:59 
Re: planetary and atmospheric rotation - origins, direction, etc
 Dr J R Stockton <jrs@[  2008-02-29 17:57:33 
Re: planetary and atmospheric rotation - origins, direction, etc
 throopw@[EMAIL PROTECTED]  2008-02-29 20:08:13 
Re: planetary and atmospheric rotation - origins, direction, etc
 Tim Little <tim@[EMAIL  2008-02-29 23:48:38 

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