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Planetary accretion?
- tvanflandern
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19 years 8 months ago #13253
by tvanflandern
Reply from Tom Van Flandern was created by tvanflandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Rajamaki</i>
<br />I can't see how planets could form from the solar disc as surely any matter present would be swept up into the main body of the proto star?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">There are problems with planet formation from a disk, but being swept up by the protostar is not one of them. Anything with angular momentum (i.e., orbiting) cannot be swept up or get any closer to the star than its elliptical orbit allows. -|Tom|-
<br />I can't see how planets could form from the solar disc as surely any matter present would be swept up into the main body of the proto star?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">There are problems with planet formation from a disk, but being swept up by the protostar is not one of them. Anything with angular momentum (i.e., orbiting) cannot be swept up or get any closer to the star than its elliptical orbit allows. -|Tom|-
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19 years 8 months ago #13278
by Jim
Replied by Jim on topic Reply from
Hoping it is helpful to make this comment: the disk accredation explaination of how planets form is just a model and does not in fact reflect real events. The truth is no one knows how planets formed or how anything else formed. It is just models that are being played for all they are worth and nothing more.
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- The Heretic
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18 years 10 months ago #14840
by The Heretic
Replied by The Heretic on topic Reply from Melvin Bibbee
Jim, models are made to be invalidated. My own is a case in point. Refer to my foolishness in the Valles Marineris thread. LOL:)!
Thx,
Melvin R. Bibbee II
Thx,
Melvin R. Bibbee II
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18 years 10 months ago #14844
by Dangus
Replied by Dangus on topic Reply from
Honestly I'm more clear on accretion than I am on why planets distribute out with the spacing they have, and why they don't end up in the same orbits. I've read on it, but I honestly haven't fully absorbed it yet.
"Regret can only change the future" -Me
"Every judgment teeters on the brink of error. To claim absolute knowledge is to become monstrous. Knowledge is an unending adventure at the edge of uncertainty." Frank Herbert, Dune 1965
"Regret can only change the future" -Me
"Every judgment teeters on the brink of error. To claim absolute knowledge is to become monstrous. Knowledge is an unending adventure at the edge of uncertainty." Frank Herbert, Dune 1965
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18 years 10 months ago #14847
by MarkVitrone
Replied by MarkVitrone on topic Reply from Mark Vitrone
Correct me if I am wrong but doesn't Bode's Law predict the distribution of the planets using the Law of Gravitation? Several predicted locations eventually yielded discovered planets. Notice (Jim especially since I know how much you hate models) that the distribution is governed by a law, not a theory. That is the purpose of this thread, to hash out hypotheses about why the planets spread out the way they did.
My own question now: Could a star experience overspin and eject material that later accretes according to Bode's Law?
Mark Vitrone
My own question now: Could a star experience overspin and eject material that later accretes according to Bode's Law?
Mark Vitrone
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18 years 10 months ago #17131
by tvanflandern
Replied by tvanflandern on topic Reply from Tom Van Flandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by MarkVitrone</i>
<br />Could a star experience overspin and eject material that later accretes according to Bode's Law?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">No. But fission combined with tidal forces can do the trick. See metaresearch.org/solar%20system/origins/...nal-solar-system.asp (which you have probably seen, but which needed to be referenced in this thread anyway). -|Tom|-
<br />Could a star experience overspin and eject material that later accretes according to Bode's Law?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">No. But fission combined with tidal forces can do the trick. See metaresearch.org/solar%20system/origins/...nal-solar-system.asp (which you have probably seen, but which needed to be referenced in this thread anyway). -|Tom|-
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