Poyasnenie: Nekotorye polyarnye siyaniya mozhno uvidet' tol'ko s pomosh'yu fotoapparata. Eto nevidimye polyarnye siyaniya, slishkom slabye, chtoby ih mozhno bylo uvidet' nevooruzhennym glazom. Vse potomu, chto chelovecheskii glaz sobiraet kvanty sveta za doli sekundy, a fotoapparat mozhet ih sobirat' prakticheski bezgranichnoe vremya. Poka fotograf snimal zhivopisnyi peizazh nad okrugom Dzhunou v amerikanskom shtate Alyaska, u nego takzhe poluchilos' zapechatlet' i zelenye nevidimye polyarnye siyaniya nad gorizontom. Kak izvestno, poyavlenie polyarnyh siyanii vyzvano stolknoveniem energichnyh chastic, letyashih ot Solnca, s magnitnym okruzheniem Zemli. Energichnye chasticy, takie kak elektrony i protony, slivayutsya vblizi polyusov Zemli i stalkivayutsya s atmosferoi. Molekuly vozduha, s kotorymi proishodit stolknovenie, teryayut elektrony, a zatem, kogda molekuly kisloroda zahvatyvayut obratno elektrony, ispuskaetsya zelenyi svet. Voobshe zhe polyarnye siyaniya mogut prinimat' raznoobraznye formy i cveta.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
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& Michigan Tech. U.

Publikacii s klyuchevymi slovami: aurora - polyarnoe siyanie - Magnitnoe pole Zemli Publikacii so slovami: aurora - polyarnoe siyanie - Magnitnoe pole Zemli
Sm. takzhe: North Celestial Aurora Polyarnoe siyanie nad poluostrovom Benks Drakon severnogo siyaniya nad Islandiei Stabil'noe krasnoe polyarnoe siyanie nad Novoi Zelandiei Severnoe siyanie i Mlechnyi Put' nad Norvegiei Stabil'noe krasnoe polyarnoe siyanie i Mlechnyi Put' Severnoe siyanie nad Norvegiei v vide skazochnogo sushestva Vse publikacii na tu zhe temu >>