Magnetic field, auroras, magnetic declination and magnetic field reversals.
地球的磁场 、 极光 、 磁偏角和地磁极倒转.
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A prominent green line in the spectrum of the auroras is called the'auroral line '.
极光光谱中的一条主要绿线被称之为极光谱线.
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If viewed from space, auroras can be to glow in X-ray and ultraviolet light as well.
如果在太空中观察, 极光还会发出 X 光和远紫外光.
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黎明的女神北极光的出现,在地球的外空大气层粒子的碰撞并且伴随许多原子在大气层的上面.
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There are all kinds of auroras, but the most well-known are the aurora borealis, or Northern Lights.
尽管极光多种多样,但最有名的还是北极光。
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