1·The solar ejections that cause auroras can also create geomagnetic storms that can affect spacewalking astronauts, Earth-orbiting satellites, and even communications and power systems on the ground.
引起极光的太阳能量抛射还能引起地磁风暴，能够影响宇航员的太空行走，绕地卫星甚至是地面上的通信和电力系统。
2·In fact, sky-watchers were snapping pictures of auroras as far south as Oslo, Lake Manitoba in Canada, and Lake Superior (map) in the United States.
事实上，天空观测者在较南的奥斯陆、加拿大马尼托巴湖和美国的苏必利尔湖都拍摄到了极光的照片。
3·Scientists combined ultraviolet images of the auroras, taken by Hubble over a period of days, with visible-light images of the ringed planet.
科学家把由哈勃望远镜在一段日子里所获取的极光紫外线与这环形星球可见光结合起来。
4·In contrast, the colorful auroras that light up the skies at high latitudes are powered by particles with less than one thousandth as much energy.
相比之下，那些处于高纬度并照亮天空的艳丽极光所提供给粒子的能量不到前者的千分之一。
5·A solar storm headed for Earth isn't a guarantee of auroras.
冲着地球来的太阳风暴并不是极光出现的保证。