meteoroid是什么意思

meteoroid中文什么意思

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Observation of meteors throws light on our understanding of the motion of the celestial bodies in our solar system , physical properties of the earths upper atmosphere and the spatial distribution of meteoroids which helps choosing safe and proper trajectories for launch vehicles such as artificial satellites
观测研究流星对研究太阳系天体的运动地球高空大气物理性质了解流星体分布这项资料对选择航天器如人造卫星的运行轨迹十分重要等都有重要的意义。
This at least accounts for the fact that a particular group of meteoroids shares with its parent comet more or less the same orbit , which can remain relatively unchanged over eons . an immediate consequence is that our earth makes periodic rendezvous with this meteoroid swarm , thereby culminating in a regular display of these celestial fireworks . to name a few , we have the lyrids in april and the geminids in december
流星雨的成因是地球遇上了一群密集的流星体，一般相信，流星群是由周期性彗星分解出来的物质或由瓦解了的彗核所形成，所以流星群和其母体彗星有大致相同的轨道，由于流星群的轨道颇为固定，所以地球会周期性地穿越这些流星群，形成固定出现的流星雨，例如四月天琴座流星雨十二月双子座流星雨等。