Poyasnenie: Tumannost' Polumesyac (Crescent Nebula) predstavlyaet soboi bystro rasshiryayushuyusya gazovuyu obolochku, kotoraya okruzhaet umirayushuyu zvezdu. Na etom nedavno opublikovannom snimke, poluchennom kosmicheskim teleskopom Habbla, v iskusstvennyh cvetah pokazana yarkaya i dinamichnaya chast' tumannosti poperechnikom tri svetovyh goda. Tumannost' Polumesyac nachala formirovat'sya primerno 250 tys. let nazad, kogda ee central'naya zvezda tipa Vol'fa-Raie WR 136 nachala postepenno sbrasyvat' svoi vneshnie sloi za schet sil'nogo zvezdnogo vetra, teryaya kazhdye 10 tys. let massu, ravnuyu masse nashego Solnca. Etot veter, stalkivayas' s okruzhayushim mezhzvezdnym gazom i uplotnyaya ego porodil ryad slozhnyh obolochek i vyzval ih svechenie. Tumannost' Polumesyac, oboznachaemaya takzhe NGC 6888, nahoditsya na rasstoyanii okolo 4700 svetovyh let v sozvezdii Lebedya i mozhet byt' zamechena tol'ko v teleskop. V techenie blizhaishego milliona let zvezda WR 136 veroyatno vspyhnet kak sverhnovaya.
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Publikacii s klyuchevymi slovami:
nebula - spiral'naya galaktika - Wolf-Rayet star - Crescent Nebula - NGC 6888 - karlikovaya galaktika - polumesyac - zvezdy Vol'fa-Raie - tumannost'
Publikacii so slovami: nebula - spiral'naya galaktika - Wolf-Rayet star - Crescent Nebula - NGC 6888 - karlikovaya galaktika - polumesyac - zvezdy Vol'fa-Raie - tumannost' | |
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