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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Explanation: Will it be curtains for one of these auroras?
说明: 上图中哪一束极光可以被归类成“帘幕”?
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Explanation : Few auroras show this level of detail.
极光很少显现出其如此清晰的细节.
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Explanation : Auroras can make spectacular sights.
极光能织就一幅绚丽的美景.
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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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Auroras occur when charged particles outside the Earth's atmosphere collide with atoms in the upper atmosphere.
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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