by APOD Robot » Tue Oct 14, 2014 4:07 am
Auroral Corona over Norway
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
Kvaløya,
Tromsø,
Norway. The
Sessøyfjorden fjord runs through the foreground, while numerous stars are visible far in the distance.
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[url=http://apod.nasa.gov/apod/ap141014.html][img]http://apod.nasa.gov/apod/calendar/S_141014.jpg[/img] [size=150]Auroral Corona over Norway[/size][/url]
[b] Explanation: [/b] 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 [url=http://www-spof.gsfc.nasa.gov/Education/whelect.html]electrons[/url] and [url=http://en.wikipedia.org/wiki/Proton]protons[/url] striking atoms and molecules in the [url=http://www.grc.nasa.gov/WWW/k-12/airplane/atmosphere.html]Earth's atmosphere[/url]. Somewhat uncommon, an [url=http://auroraalive.com/multimedia/autoformat/get_swf.php?videoSite=aurora&videoFile=aa_corona.swf]auroral corona[/url] appears as a center point for a surrounding display and may occur when an aurora develops directly overhead, or when [url=http://apod.nasa.gov/apod/ap080101.html]auroral rays[/url] are pointed nearly toward the observer. [url=http://spaceweathergallery.com/indiv_upload.php?upload_id=101727]This picturesque[/url] but brief green and purple [url=https://www.youtube.com/watch?v=3miOu66D2Xc]aurora exhibition[/url] occurred last month high above [url=http://en.wikipedia.org/wiki/Kval%C3%B8ya_(Troms%C3%B8)]Kvaløya[/url], [url=http://en.wikipedia.org/wiki/Troms%C3%B8]Tromsø[/url], [url=http://en.wikipedia.org/wiki/Norway]Norway[/url]. The [url=http://peakbook.org/en/tour/44612/S%C3%B8rtinden+%26+Brosmetinden.html]Sessøyfjorden[/url] [url=http://en.wikipedia.org/wiki/Fjord]fjord[/url] runs through the foreground, while numerous stars are visible far in the distance.
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