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The Northern Lights The solar wind constantly streams toward the Earth，but dont worry because a protective magnetic field surrounds our planet.The same magnetic field that makes your compass point north also steers the particles from the Sun to the north and south poles.The charged particles become trapped in magnetic belts around the Earth.When a large blast of solar wind crashes into the Earths magnetic field，the magnetic field first gets squeezed and then the magnetic field lines break and reconnect.4 Watching auroras is fun and exciting，but normally you can only see them in places far north like Alaska and Canada.The movement of the aurora across the sky is usually slow enough to easily follow with your eyes but they can also pulsate，flicker，or even move like waves.During solar maximum，5 auroras are seen as far south as Florida，even Mexico! 6 We hope you are able to travel to far north places like the Arctic Circle and see the Northern Lights at least once during your lifetime.We know you will never forget it! electrifyv.使带电 plasman.等离子体 collidev.碰撞 moleculen.分子 flickerv.闪烁 Arcticadj.北极的 1. The sun cannot hold its atmosphere in check：太阳无法控制它自己的大气层。hold ...in check是控制，支配，例如： 他想通过经理的秘书控制公司。 | 
