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单词 radiant region
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radiant region
radiant region n. Astronomy Obsolete the small region of the sky from which the meteors in a meteor shower appear to diverge; cf. radiant point n.
ΚΠ
1841 Trans. Amer. Philos. Soc. 7 267 A radiant region, if not a radiant point, was soon perceivable. The paths traced back..passed through a circle..with a radius of 2°.
1899 Science 6 Jan. 37/1 The discovery of this comet..on the radiant region of the Leonids, is the most interesting episode of the meteor observations.
extracted from radiantadj.n.
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