meteoroid swarm meaning in English
流星群
Examples
- 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。