当地球大气层以外的带电粒子与大气上层的原子碰撞的时候,就会产生极光。在天空中就会出现一帘弧形的光谱。这种现象就被称为北极光或南极光。5 A H7 P- ~/ ~3 ?& S
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[attach]958845[/attach] , u& b' z* d$ _, X2 T" w( K/ i公仔箱論壇此图是出现在加拿大丘吉尔城上空的一道明亮的北极光。它像一条喷射的火焰在天空中“熊熊燃烧”着。' r' l' `+ c) n1 `+ u0 @
These are pictures of Auroras, it appears mostly at the upper northern hemisphere. A very spectacular and rare sight. A lot of people travel a long way to catch a glimpse of it. Who knows, one day I may get a big inheritance from a long lost relative, then I will to to Sweden or further north to watch it when it comes around again. . . . in my dreams . . . 作者: sillydragon 時間: 2010-4-12 06:22 PM
欧诺拉,很美丽,好想亲眼看到噢···作者: k23bb 時間: 2010-4-13 02:30 AM