Increases in the amount of cosmic or terrestrial dust in the stratosphere could also increase the number of brightly shining clouds.
宇宙或地面尘土的增加也可能增加明亮光云的数量。
THE comings and goings of noctilucent or "night shining" clouds in the extreme upper atmosphere may be linked to the sun's rotation.
高层大气中时隐时现的发光的云团可能跟太阳的自转有关。
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