Avtory i prava: Mezhdunarodnyi astronomicheskii soyuz
Perevod: Kozyreva A.V.
Poyasnenie:
Skol'ko zhe planet v Solnechnoi sisteme?
Na etot muchayushii vseh vopros nakonec-to poyavilsya novyi oficial'nyi otvet,
kotoryi osnovan na prinyatoi
Mezhdunarodnym astronomicheskim soyuzom (MAS) rezolyucii. Planet v Solnechnoi
sisteme vosem'! Na proshloi nedele
MAS progolosoval za
novoe opredelenie ponyatiya "planeta". Soglasno emu,
Pluton ne udovletvoryaet neobhodimym kriteriyam,
chtoby byt' planetoi!
Teper' Pluton klassificiruetsya kak
karlikovaya planeta i
yavlyaetsya prototipom novogo klassa ob'ektov -
transneptunovyh
ob'ektov. Itak, soglasno rezolyucii MAS, v Solnechnuyu sistemu vhodyat
sleduyushie vosem' planet:
Merkurii,
Venera,
Zemlya,
Mars,
Yupiter,
Saturn,
Uran i
Neptun,
a takzhe tri karlikovye planety:
Cerera,
Pluton i ob'ekt bez sobstvennogo imeni
2003 UB313.
Chtoby nazyvat'sya planetoi, neobhodimo otvechat' sleduyushim kriteriyam:
ob'ekt dolzhen dvigat'sya po orbite vokrug Solnca, orbita dolzhna byt'
vydelennoi i byt' dostatochno udalennoi ot orbit drugih tel, forma ego dolzhna s
nekotorym priblizheniem byt' sfericheskoi.
Isklyuchenie
Plutona iz klassa planet
yavlyaetsya predmetom prodolzhayushihsya
raznoglasii i
sporov v astronomicheskom soobshestve.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
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Publikacii s klyuchevymi slovami:
planety - planetnaya sistema - solnechnaya sistema
Publikacii so slovami: planety - planetnaya sistema - solnechnaya sistema | |
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