Explanation: Higher than the highest mountain lies the realm of the aurora. Auroras rarely reach below 60 kilometers, and can range up to 1000 kilometers. Aurora light results from energetic electrons and protons striking atoms and molecules in the Earth's atmosphere. Somewhat uncommon, an auroral corona appears as a center point for a surrounding display and may occur when an aurora develops directly overhead, or when auroral rays are pointed nearly toward the observer. This picturesque but brief green and purple aurora exhibition occurred last month high above Kval'ya, Troms', Norway. The Sess'yfjorden fjord runs through the foreground, while numerous stars are visible far in the distance.

APOD Wall Calendar: Land and Skyscapes

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: aurora - corona - Norway - polyarnoe siyanie Publikacii so slovami: aurora - corona - Norway - polyarnoe siyanie
Sm. takzhe: Polyarnoe siyanie vokrug severnogo polyusa Saturna Raznocvetnoe polyarnoe siyanie nad Novoi Zelandiei Severnoe siyanie nad Ital'yanskimi Al'pami Severnoe siyanie v Zapadnoi Virginii Yuzhnoe polyarnoe siyanie i Mezhdunarodnaya kosmicheskaya stanciya Pozdnyaya noch' v Vallentune Severnoe siyanie, stabil'noe krasnoe polyarnoe siyanie i Mlechnyi Put' Vse publikacii na tu zhe temu >>