|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
A Question about Planet Formation
Three days ago (4/10) I posted the below article under the same thread
title to sci.astro, but nobody there could give me a decent answer. So now I am posting it here with hopes for better luck. Perhaps what I should have said on sci.astro is: Please keep in mind that what I talk about here appears to be a systematic effect. I have a problem with understanding the reason of why six of our eight planets rotate in the same direction as does our solar system (and Venus and Uranus initially seem to have done the same), but I haven=B4t found this issue discussed on this forum (*). Laz Marhenke mentioned it in 1996 in his thread "Solar System questions" but the question basically got sidestepped in the answer by Chris Carrier. Please inform me, if I have overlooked any thread on this issue. Neither have I been able to locate a webpage on which this issue is explained. On http://www.bu.edu/core/cc105/lecture...stemFormation= /L20-solsysformation.html I found a mere mention of that this is due to the conservation of angular momentum, and that supposedly the angular momentum (of the ....?planet seed?) points in the same direction as it does in the "initial rotating disk". Whatever that means, it seems counterintuitive to (Laz and) me: If the protoplanetary disk (proplyd) rotates in a keplerian manner, then, if we put ourselves at any one point within such a disk, particles closer to the center than us should overtake us on the side towards the center, while particles further away from the center than us should stay behind us on the opposite side. Thus, if we are fat enough to capture particles from the disk by means of gravitation, the majority of these particles should end up orbiting around us in a rotational sense *opposite* to that of the proplyd, because otherwise they would oppose the keplerian stream of particles around us, i.e. overtake us on the far side from the center and stay behind us on the near side from the center. So where do I go wrong here? (or do I?) And of course, please give me sources. I prefer webpages unless it=B4s a journal article. And thank you in advance. (*) Before posting here, I have also googled this forum for the terms "planet" and "rotat" in combination with "protoplanetary disk" (zero results). |
#2
|
|||
|
|||
adult joke28
Gas station TVGas Station TV says they will install television sets at five hundred gas stations and broadcast to motorists filling up their gas tanks. Imagine the programming. It's the perfect place to watch Debbie Does Dallas while Exxon does youPoly Aluminum Chloride
__________________
Poly aluminium Chloride |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
A Question about Planet Formation | [email protected] | Astronomy Misc | 3 | April 11th 08 11:18 AM |
pulsar/planet formation podcast | atm2020 | Amateur Astronomy | 0 | April 6th 06 05:58 AM |
Clues to Planet Formation Revealed | [email protected] | News | 0 | May 23rd 05 06:54 PM |