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The Cree called them the 'Dance of the Spirits.' Cree称他们为“精神之舞”。
In Finland, they said the lights were caused by the firefox running so quickly across the 在芬兰，他们表示这些灯光是由于火狐在这条街上跑得太快而引起的
snow that his tail sent sparks into the sky. 他的尾巴发出的雪花燃起了天空。
Ancient Chinese observers believed they were the flames of good and evil dragons battling 古代中国观察家认为，他们是善恶龙战斗的火焰
in the heavens. 在天堂。
Even today, these mysterious and unpredictable lights are called 'Aurora,' after the Roman 即使在今天，这些神秘而不可预知的灯光在罗马之后被称为“极光”
goddess of the dawn. 黎明的女神。
An aurora, also known as a polar light, is a display of lights in the sky in the Arctic 极光，也被称为极光，是北极天空中的灯光
and Antarctic regions, in an area known as the auroral zone. 和南极地区，在一个被称为极光区的地区。
An aurora around the North Pole is called 'aurora borealis' or the northern lights. 北极周围的极光称为'北极光'或北极光。
An aurora around the South Pole is called 'aurora australis,' or the southern lights. 南极周围的极光被称为“澳洲极光”，或南极光。
They are usually greenish in color, but are sometimes blue, violet, pink, or even red. 它们通常呈绿色，但有时呈蓝色，紫色，粉红色，甚至红色。
Auroras constantly move and change shape. 极光不断移动并改变形状。
Sometimes they are so dim they can be mistaken for clouds. 有时候他们很昏暗，可能会被误认为是云。
Other times they are bright enough to read by. 其他时候，它们足够明亮，可以阅读。
But what causes these amazing lights? 但是什么导致这些惊人的灯光？
Auroras actually begin at the sun, which burns with so much energy that it superheats the 极光实际上是从太阳开始的，太阳燃烧着太多的能量使它过热
gasses around it. 周围有气体。
Tiny particles, or pieces, of the sun are blasted away from it at speeds of over 450 太阳的微粒或碎片以超过450的速度喷出
miles or 750 kilometers per second. 英里或每秒750公里。
This stream of particles is called the solar wind, and the Earth is directly in its path. 这粒子流称为太阳风，地球直接在它的道路上。
The solar wind can disrupt satellites and be harmful to astronauts in space, but the 太阳风会破坏卫星并对太空中的宇航员造成伤害，
earth is protected because of its magentic field. 地球由于它的磁场而受到保护。
The Earth has a molten iron core that rotates quickly, turning it into a giant magnet. 地球有一个迅速旋转的铁水芯，将它变成一块巨大的磁铁。
The magnetic field around the Earth is called the magnetosphere, and like a magnet, it has 地球周围的磁场被称为磁层，就像磁铁一样
a north pole and a south pole. 北极和南极。
Most of the particles from the sun are deflected by the Earth's magnetosphere, but some make 大部分来自太阳的粒子都被地球的磁层偏转，但有些会产生
it through to bombard the atmosphere. 它通过轰击大气。
As these electrically charged particles strike the atmosphere, they excite the oxygen and 当这些带电粒子撞击大气时，它们会激发氧气和氧气
nitrogen atoms, causing them to light up in the beautiful colors of an aurora. 氮原子，使它们以极光的美丽色彩点亮。
If you want to see an aurora on earth, you should head to areas near the poles. 如果你想看到地球上的极光，你应该前往极点附近的地区。
You may not know that auroras are also visible from space, where they can be seen as rings 你可能不知道极光也可以从太空中看到，它们可以被视为环
around the north and south poles. 围绕南北两极。
The earth is not the only planet to have auroras; they have been observed on Mars, Jupiter, 地球不是唯一拥有极光的行星;他们在火星，木星，
Saturn, Neptune, and Uranus as well. 土星，海王星和天王星也是如此。
Like the auroras on earth, auroras on other planets occur around their north and south poles. 就像地球上的极光一样，其他行星上的极光出现在它们的北极和南极。
Shifting curtains of light in the night sky, auroras have fascinated people for thousands 在夜空中移动光线的窗帘，极光让数千人着迷
of years. 多年。
They are a visible reminder of the connection our earth has to the sun, and one of the most 它们可以提醒我们地球对太阳的联系，也是最重要的联系之一
beautiful phenomena in the heavens. 天上的美丽现象。
I hope you enjoyed learning about auroras today. 我希望你喜欢今天学习有关极光的知识。
Goodbye till next time! 再见，直到下次！