... periodic comet 周期彗星 periodic stream 周期(性)流星雨 periodic term 周期项 ...
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NON-PERIODIC COMET 非周期彗星
long-periodic comet 分成长周期彗星
·2,447,543篇论文数据,部分数据来源于NoteExpress
A comet with an orbital period of less than 200 years is called a "periodic comet", of which the best known is probably Halley's comet, which orbits the Sun every 76 years.
有着一个少于200年的轨道周期的彗星被称作“周期彗星”,其中最著名的可能要数哈雷彗星,它每76年围绕太阳运转一圈。
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