shower radiant 中文意思是什麼
shower radiant
解釋
流星雨輻射點-
A " meteor shower " occurs when our home planet encounters a relatively dense region of meteoroids in space. an unusually large number of meteors can then be seen streaming from a certain point in the sky known as the " radiant "
許多流星像從星空中某一點稱為輻射點向外散射而出,其實流星群飛向地球時大致是平行的,輻射點是視覺上的透視象。
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