Earth's Supersun and Subsun, Two Suns Explained
2011年10月7日 上午 07:53:48
Translation by Autumnson Blog
一個超級太陽，正如從挪威上面39,000英尺（12公里）的飛機見到，懸浮在空氣中的冰晶體可反射來自夕陽的光線，創造一種特殊種類的鏡像，其中第二個“太陽”出現在真正的太陽之上。
When conditions are just right, a "supersun," like the one in this image, appears in the sky above the setting Sun. This feature is created when sunlight bounces off the underside of horizontally oriented ice crystals suspended in the air. The phenomenon is usually only visible to people on airplanes or high in the mountains, in situations where the Sun itself is below the true horizon (as it would appear to a person standing at ground level) but not yet below the horizon of the airborne observer.
當條件恰到好處，一個像這圖片的“超級太陽”，會出現在夕陽上的天空。這特色會被創建，當太陽光反射懸浮在空氣中水平方向的冰晶體的下方，這現象通常是唯一可由在飛機或高山上的人見到，在情況當太陽本身是在真正的地平線以下（因為它會出現對一個站立在地面水平的人），但尚未低於空中觀察員的地平線。
Notice the supersun's elongated appearance in the photograph. This vertical stretching is due to the curvature of the Earth. Collectively, the faces of all the tiny airborne ice crystals act as a giant concave mirror. At lower altitudes, where there is a smaller difference between the observer's horizon and the true horizon, small irregularities in the orientation of the ice crystals cause the reflected light to stretch into a pillar that rises into the sky. At higher altitudes, the curvature of the Earth causes the supersun to look more compact and distinct, as it does here.
注意超級太陽在照片中的拉長外觀，這種縱向伸展是由於地球的曲率。總的來說，所有微小的空中冰晶的面孔扮作一塊巨大的凹鏡。在低海拔地區，在那裡觀察者的水平線和真正的地平線之間是有較小的差別，在冰晶的方向小小的不規則造成被反射的光伸展成為一條支柱，向天空上升。在高海拔地區，地球曲率導致超級太陽看來更加緊湊和獨特，正如它在這裡做的。
An observer standing at ground level will never see a supersun, since the light bouncing off the crystals will always be blocked by the surface of the Earth.
一位站在地面的觀察員將永遠看不到一個超級太陽，因為光反彈水晶體將經常被地球的表面阻礙。
For more please clicked
http://beforeitsnews.com/story/1196/310/Earths_Supersun_and_Subsun,_Two_Suns_Explained.html
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