中文注释:自然界的奇景——极光,令美国缅因州的阿卡迪亚国家公园笼罩在一片粉红色中。这些自然形成的令人眼花缭乱的光影图案,在南半球被称为“北极光”。极光的形成,主要是地球大气层以外的粒子与大气层上部的原子产生碰撞,从而形成了帘状、弧状、带状的光线,在天空中伸展。 作者: Michael Medford
缅因 国家公园 阿卡迪亚 极光 图片故事:高清壁纸:英文注释:Aurora Borealis, Acadia National Park, Maine, 2005 Nature's light show—aurora borealis—bathes Maine's Acadia National Park in a pink glow. These dazzling patterns in nature, called aurora australis in the Southern Hemisphere, are created when charged particles outside the Earth's atmosphere collide with atoms in the upper atmosphere, producing a glowing display of curtains, arcs, and bands stretching across the sky. (Photo shot on assignment for, but not published in, "Autumn in Acadia National Park," November 2005, National Geographic magazine) 随机推荐: |
