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Re[2]: Temnaya energiya i vsemirnoe antityagotenie
18.05.2008 18:59 | Dmitrii Docenko
Uvazhaemyi gospodin Ganadyan!
Ochen' horosho, chto vy lyubite astronomiyu. No, pomimo etogo, nuzhno eshe i nemnogo luchshe ponimat' fiziku.
Ya zabudu poka pro Vashi dovody protiv (esli vam interesno, ya na nih otvechu) i prokommentiruyu vashu versiyu proishozhdeniya Solnechnoi sistemy.
Da, Solnce teryaet cherez izluchenie okolo 4.3 mln tonn v sekundu. Plyus k etomu, nuzhno skazat', eshe 1.6 mln tonn v sekundu teryaetsya posredstvom solnechnogo vetra. Da, eto vyzyvaet izmenenie sily prityazheniya Solnce i vedet k uvelicheniyu rasstoyaniya mezhdu planetami i Solncem. Ocenim velichinu etogo uvelicheniya.
Itak, za maloe vremya dt massa Solnca izmenilas' ot M do M'=M-dM, gde dM/M mnogo men'she edinicy. Takim obrazom, skorost' dvizheniya Zemli po orbite okazyvaetsya bol'she skorosti krugovogo dvizheniya i Zemlya nemnogo otdalyaetsya ot Solnca. Pri otdalenii ona teryaet skorost' iz-za uvelicheniya potencial'noi energii. V kakoi-to moment skorost' stanovitsya ravna skorosti krugovogo dvizheniya na orbite novogo radiusa i Zemlya perehodit na vrashenie po etoi novoi krugovoi orbite. Raspishem zakon sohraneniya energii posle izmeneniya massy Solnca (sprava - energiya na nachal'noi orbite radiusa R, sleva - na konechnoi orbite radiusa R'):
mv2/2 - G M'm/R = mv'2/2 - G M'm/R', zdes' v i v' - nachal'nye i konechnye krugovye skorosti dvizheniya Zemli, v2=GM/R, v'2=GM'/R'. Sokrashaya na Gm, poluchim M/2R - M'/R = M'/2R' - M'/R'.
Takim obrazom, poluchaem, chto R'=R(1+dM/M) , to est' radius orbity menyaetsya obratno proporcional'no masse Solnca (RM=R'M'). Za god massa Solnca menyaetsya primerno na 10^-13 svoego znacheniya, to est' radius uvelichitsya na 10^-13 a.e. = 1.5 sm. Za milliard let otnositel'noe izmenenie massy (i, sledovatel'no, radiusa) okolo 0.01%.
Pohozhe, v svoih raschetah vy sil'no pereocenili velichinu skorosti udaleniya planet ot Solnca (esli, konechno, ya nigde ne oshibsya).
[Citirovat'][Otvetit'][Novoe soobshenie]
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- Re: Temnaya energiya i vsemirnoe antityagotenie (O. V. Ganadyan, 18.05.2008 8:23, 3.4 KBait, otvetov: 1)
- >> Re[2]: Temnaya energiya i vsemirnoe antityagotenie (Dmitrii Docenko, 18.05.2008 18:59, 1.9 KBait)
- Re: Temnaya energiya i vsemirnoe antityagotenie (O. V. Ganadyan, 20.05.2008 10:31, 4.8 KBait, otvetov: 1)
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