Copyright:
Ken Williams
原文:
The setting had been picked out — all that was needed was an aurora. And late last August, forecasts predicted that an otherwise beautiful night sky would be lit up with auroral green. Jumping into his truck, the astrophotographer approached his secret site — but only after a five hour drive across the rural Upper Peninsula of Michigan. What he didn’t know was that his luck was just beginning. While setting up for the image, a proton arc — a rare type of aurora — appeared. The red arc lasted only about 15 minutes, but that was long enough to capture in a 30-second exposure. As the name indicates, proton arcs are caused not by electrons but by more massive protons that bombard the Earth’s atmosphere following an energetic event on the Sun. In the featured image, the yellow lights on the horizon are the city lights of Marquette, Michigan, USA. The blue and yellow rocks in the Lake Superior foreground are lit by a LED flashlight. Also captured, to the left of the red proton arc, was the band of our Milky Way Galaxy. APOD Editor to Speak: Saturday, August 8 at Keweenaw Science & Engineering Festival
中文翻譯:
設置已經選好，只需要一個極光。去年八月末，預報預測一個美麗的夜空將被極光的綠色照亮。這位天文攝影師跳上他的卡車，前往他秘密的拍攝地點，但在此之前，他已經驅車行駛了五個小時，穿越密西根州上半島的鄉村。卻不知他的運氣才剛剛開始。在設置拍攝設備的時候，一道罕見的質子弧景象出現了。這道紅色的弧光只持續了大約15分鐘，但足以捕捉到一張30秒的曝光圖片。顧名思義，質子弧是由質量更大的質子造成的，它們在太陽的能量事件後轟擊地球的氛圍。在這幅作品中，地平線上的黃色燈光是美國密西根州馬基特市的城市燈光。湖岸邊的藍色和黃色岩石則是用LED手電筒照亮的。此外，在紅色質子弧的左邊，還捕捉到了我們銀河系的星帶。
✨#極光 #質子弧 #天文攝影 #馬基特市 #密西根上半島 #銀河系 #夜空攝影 #攝影愛好者 #自然之美 #風景攝影✨
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來源:NASA每日圖片
