Did Venus Have A Moon? |
Did Venus Have A Moon? |
 Oct 11 2006, 07:06 PM
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 Senior Member  Group: Moderator Posts: 6481 Joined: 8-December 05 From: Los Angeles Member No.: 602  |
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 14 2006, 03:45 AM
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#2
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Senior Member Group: Moderator Posts: 6481 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Argh...my apologies for misunderstanding you, RN.
 Well, the central point I was trying to make was that Mars' rotation period does not seem to be an artifact of primordial major impacts, although I'm sure that some such events certainly had an influence. Venus' case is entirely different...and just to throw a bit more churn into the mix, what in blazes must've happened to Uranus???  I am willing to accept chaotic early System events like major collisions as likely explanations for some current dynamic oddities like the Venusian rotation period & direction. However, Sagan's Law must still apply: extraordinary theories require extraordinary evidence. Using this heuristic, the "two-moon Venus" (or even one-moon) scenario seems difficult to defend. (Did someone just mutter "Hyperion"??? Quiet, you!  )
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Oct 15 2006, 12:00 AM
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#3
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
QUOTE (nprev @ Oct 13 2006, 10:45 PM)  Argh...my apologies for misunderstanding you, RN. Below picture corresponds to Syrtis Major Plantia. I am referring to the East of Syrtis in which JRehling told you that is right: Isidis. I am sorry for that confusion. But, anyway, very close!!!! just on the East  Below shows the Syrtis Major Plantia (black part) and the East is the Isidis.   Rodolfo |
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Oct 19 2006, 09:27 AM
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#4
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Senior Member Group: Moderator Posts: 6481 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Delinquent thanks for the great "pocket" Mars map, Rodolfo!
 Here's a thought: What if any relationship does internal volcanic activity/mass redistribution have on planetary inclination & rotation period? I know that the Tharsis bulge is thought to have had a significant influence on Mars' obliquity history, but how to explain Earth's almost identical inclination in the present era? Not to mention the fact that Venus has both an obviously active volcanic history and an anomalous rotation period, yet virtually no axial inclination! And finally, who knows what's happening now or in the distant past on the "surface" (to say nothing of the interior) of Uranus? The circumstances influencing these planetary characteristics must be fearsomely complex. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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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 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 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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