( on June 22 and June 23, the Aurora Borealis put on quite a show for New York State. This photo was taken in the small village of Speculator, N.Y., in the Adirondack Mountains.)
据了解,极光通常出现于星球的高磁纬地区上空,是一种绚丽多彩的发光现象。而地球的极光,则主要由地球磁层或太阳的高能带电粒子流(太阳风)使高层大气分子或原子激发(或电离)而产生。