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克里语里把它叫做"灵魂的舞动" The Cree called them the 'Dance of the Spirits.'
在芬兰，人们说，这光是火狐迅速奔跑穿越雪地时尾巴溅起的火花 In Finland, they said the lights were caused by the firefox running so quickly across the
snow that his tail sent sparks into the sky.
古代中国人认为，这是天上的好龙和恶龙激战的火光 Ancient Chinese observers believed they were the flames of good and evil dragons battling
in the heavens.
现在，这神秘莫测的光，以罗马神话中曙光女神的名字命名 Even today, these mysterious and unpredictable lights are called 'Aurora,' after the Roman
"奥罗拉" goddess of the dawn.
奥罗拉，也叫极光，是南北极上空出现的光学现象 An aurora, also known as a polar light, is a display of lights in the sky in the Arctic
这些区域也叫做"奥罗拉地带" and Antarctic regions, in an area known as the auroral zone.
北极的奥罗拉，被叫做"北极光" An aurora around the North Pole is called 'aurora borealis' or the northern lights.
南极的奥罗拉，被叫做"南极光" An aurora around the South Pole is called 'aurora australis,' or the southern lights.
通常是绿色的，有时也呈现蓝色、紫色、粉色甚至红色 They are usually greenish in color, but are sometimes blue, violet, pink, or even red.
极光不停运动、改变形状 Auroras constantly move and change shape.
有时光线昏暗，被误认为云朵 Sometimes they are so dim they can be mistaken for clouds.
有时十分明亮，容易辨识 Other times they are bright enough to read by.
究竟什么导致了这神奇的光线 But what causes these amazing lights?
极光源自太阳，太阳的巨大能量灼烧着周围的空气 Auroras actually begin at the sun, which burns with so much energy that it superheats the
gasses around it.
因此，太阳粒子、物质，以超过450公里或750公里每秒的速度散离 Tiny particles, or pieces, of the sun are blasted away from it at speeds of over 450
miles or 750 kilometers per second.
这些粒子流叫做太阳风，地球恰好位于它吹过的区域 This stream of particles is called the solar wind, and the Earth is directly in its path.
太阳风会干扰卫星，对太空中的宇航员有伤害 The solar wind can disrupt satellites and be harmful to astronauts in space, but the
但地球却因为有磁场而免于伤害 earth is protected because of its magentic field.
地球有一个快速旋转的熔铁核心，让地球成为一个巨大磁体 The Earth has a molten iron core that rotates quickly, turning it into a giant magnet.
环绕着地球的磁场，叫做"磁气圈"，如磁体一样 The magnetic field around the Earth is called the magnetosphere, and like a magnet, it has
有南北极之分 a north pole and a south pole.
大部分太阳粒子被地球的磁力圈"带偏"，小部分穿越磁力圈 Most of the particles from the sun are deflected by the Earth's magnetosphere, but some make
从而"轰炸"大气层 it through to bombard the atmosphere.
当这些带电粒子撞击大气层时，激起氧原子和氮原子 As these electrically charged particles strike the atmosphere, they excite the oxygen and
形成了极光里漂亮的色彩 nitrogen atoms, causing them to light up in the beautiful colors of an aurora.
想在地球上看极光，必须要到靠近两极的区域 If you want to see an aurora on earth, you should head to areas near the poles.
你可能不知道，从太空中也能看到极光，看起来像南北极上空的指环 You may not know that auroras are also visible from space, where they can be seen as rings
around the north and south poles.
地球不是唯一有极光的行星，火星、木星、土星、海王星、天王星都有 The earth is not the only planet to have auroras; they have been observed on Mars, Jupiter,
Saturn, Neptune, and Uranus as well.
如同地球上的极光一样，其他行星的极光也是出现在南北两极的 Like the auroras on earth, auroras on other planets occur around their north and south poles.
极光，这夜晚天空里变幻流动的光幔，千百年来令人着迷 Shifting curtains of light in the night sky, auroras have fascinated people for thousands
of years.
它提示着地球与太阳的关系，它是天空中最美的景象 They are a visible reminder of the connection our earth has to the sun, and one of the most
beautiful phenomena in the heavens.
愿您喜欢今天关于极光的内容 I hope you enjoyed learning about auroras today.
下回见 Goodbye till next time!