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Re[2]: voprosy po astronomii
10.02.2008 16:28 | M. Yu. Yakimov
Do blizhaishih zvezd - izmeryayut godichnyiprallaks. Etot princip primerno ekvivalenten principu binokulyarnogo zreniya, tol'ko rasstoyaniem mezhdu "glazami" v dannom sluchae vystupaet diametr orbity Zemli. Poryadok velichiny godichnogo parallaksa (t.e. izmeneniya uglovyh koordinat blizhaishih zvezd na nebesnoi sfere v techenie goda) doli uglovoi sekundy. Otsyuda zhe edinica mezhzvezdnyh rasstoyanii parsek - parallaks-sekunda (tri s nebol'shim svetovyh goda).
V sluchae planet ihvidimoe polozhenie otnositel'no zvezdzametno menyayutsya uzhe pri izmenenii polozheniya nablyudatelya pri vrashenii Zemli ili sudalennyh drug ot druga tochek poverhnosti Zemli- princip tot zhe samyi.
V osnove etih metodov - tochnye izmereniya polozheniya planet iSolnca otnositel'no zvezd i zvezd otnositel'no drug druga. Pri etom uzhe nuzhno uchityvat' popravki, vyzvaemye, v chastnosti, dvizheniem Zemliv prostranstve i konechnost'yu skorosti sveta.
No gorazdo bol'shuyu tochnost' daet izmerenie rasstoyanii do blizkih ob'ektov metodami radiolokacii (v tom chisle do Solnca i planet).
Podrobnee sm. http://www.astronet.ru/db/msg/1188617 i soderzhashiesya tam ssylki.
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- Re: voprosy po astronomii (A. I. Kachmar, 19.01.2007 16:50, 80 Bait)
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- Re: voprosy po astronomii (Galina Kulikova, 24.01.2007 10:58, 127 Bait)
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- Re[3]: voprosy po astronomii (aleksei f, 13.02.2008 17:25, 2 Bait)
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