periodic comet
Astronomy
noun
A comet with an observably elliptical orbit, especially one that brings it into the inner solar system at regular intervals.
Origin
Mid 19th century.
| 单词 | periodic comet |
| 释义 | periodic cometAstronomy noun A comet with an observably elliptical orbit, especially one that brings it into the inner solar system at regular intervals. Origin |
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