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Did Venus Have A Moon?
nprev
post Oct 11 2006, 07:06 PM
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...or two?

http://skytonight.com/news/home/4353026.html


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Bill Harris
post Oct 12 2006, 03:42 PM
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QUOTE
My initial thought was "but that requires dumping a massive load of energy".

However, a quick look at Excel, and I see (assuming an early Venus rotated at terrestrial kind-of-rates) some 1.9*10^29 joules of rotational energy needs to have been absorbed.

Just a thought... perhaps this atmospheric despinning added to Venus' hot surface temperature. The despinning could have created very high surface temperatures for the first couple of billion years and the greenhouse effect would add to the temperature and keep it from cooling as fast. Or vice versa. Very odd planet, but then, aren't they all...

--Bill


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- nprev   Did Venus Have A Moon?   Oct 11 2006, 07:06 PM
- - Myran   I read it and agree that slow rotation of Venus ar...   Oct 11 2006, 08:01 PM
- - Jyril   I agree, the theory sounds a bit too complicated a...   Oct 11 2006, 08:08 PM
- - Rob Pinnegar   Cute, but it's just speculation. Nobody can pr...   Oct 11 2006, 08:09 PM
|- - JRehling   Keep in mind that the rate of Venus's rotation...   Oct 11 2006, 09:07 PM
|- - AndyG   QUOTE (Rob Pinnegar @ Oct 11 2006, 09:09 ...   Oct 12 2006, 08:41 AM
- - tasp   Whew, heady stuff. I think the odds for the Satur...   Oct 12 2006, 03:20 AM
- - nprev   I gotta agree with the majority opinion so far; th...   Oct 12 2006, 03:53 AM
- - edstrick   Venus's solar tidal drag on the solid body is ...   Oct 12 2006, 10:18 AM
|- - Rob Pinnegar   QUOTE (edstrick @ Oct 12 2006, 04:18 AM) ...   Oct 12 2006, 02:20 PM
- - RNeuhaus   QUOTE (nprev @ Oct 11 2006, 02:06 PM) ......   Oct 12 2006, 02:49 PM
|- - JRehling   QUOTE (RNeuhaus @ Oct 12 2006, 07:49 AM) ...   Oct 12 2006, 04:08 PM
|- - Rob Pinnegar   Hmmm. Would a satellite small enough to avoid disi...   Oct 12 2006, 04:58 PM
|- - RNeuhaus   QUOTE (JRehling @ Oct 12 2006, 11:08 AM) ...   Oct 12 2006, 06:53 PM
|- - JRehling   QUOTE (RNeuhaus @ Oct 12 2006, 11:53 AM) ...   Oct 12 2006, 08:25 PM
- - Bill Harris   QUOTE My initial thought was "but that requir...   Oct 12 2006, 03:42 PM
- - DonPMitchell   According to dynamics calculations by Alexandre Co...   Oct 12 2006, 07:36 PM
- - nprev   Interesting...but how about Mars' relatively r...   Oct 13 2006, 04:55 AM
|- - RNeuhaus   QUOTE (nprev @ Oct 12 2006, 11:55 PM) Int...   Oct 13 2006, 06:59 PM
- - nprev   Well, I'll be...I actually didn't know tha...   Oct 14 2006, 12:14 AM
|- - JRehling   QUOTE (nprev @ Oct 13 2006, 05:14 PM) Wel...   Oct 14 2006, 02:24 AM
- - nprev   Argh...my apologies for misunderstanding you, RN. ...   Oct 14 2006, 03:45 AM
|- - JRehling   QUOTE (nprev @ Oct 13 2006, 08:45 PM) wha...   Oct 14 2006, 04:59 AM
||- - ugordan   QUOTE (JRehling @ Oct 14 2006, 05:59 AM) ...   Oct 14 2006, 09:21 AM
||- - helvick   That was my thinking too. To nudge this slightly ...   Oct 14 2006, 11:17 AM
||- - JRehling   QUOTE (helvick @ Oct 14 2006, 04:17 AM) T...   Oct 15 2006, 04:59 AM
||- - helvick   QUOTE (JRehling @ Oct 15 2006, 05:59 AM) ...   Oct 15 2006, 06:07 AM
||- - JRehling   QUOTE (helvick @ Oct 14 2006, 11:07 PM) A...   Oct 15 2006, 03:32 PM
|- - RNeuhaus   QUOTE (nprev @ Oct 13 2006, 10:45 PM) Arg...   Oct 15 2006, 12:00 AM
|- - nprev   Delinquent thanks for the great "pocket...   Oct 19 2006, 09:27 AM
|- - diane   QUOTE (nprev @ Oct 19 2006, 05:27 AM) Del...   Oct 20 2006, 10:42 PM
- - Myran   QUOTE JRehling wrote: ...would we be here as an ad...   Oct 16 2006, 11:48 AM
|- - tty   QUOTE (Myran @ Oct 16 2006, 01:48 PM) Hal...   Oct 16 2006, 06:19 PM
|- - JRehling   QUOTE (tty @ Oct 16 2006, 11:19 AM) In ea...   Oct 16 2006, 06:35 PM
- - dvandorn   Here's a question: If this model is correct a...   Oct 21 2006, 02:11 AM
- - tasp   QUOTE (dvandorn @ Oct 20 2006, 09:11 PM) ...   Oct 21 2006, 02:24 AM
- - Rob Pinnegar   QUOTE (dvandorn @ Oct 20 2006, 08:11 PM) ...   Oct 24 2006, 08:57 PM


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