小天体的尺度：小行星（Asteroid）：大于20（50）米；流星体(Meteoroid)：小 于小行星，大于100 微米；行星际尘埃（Interplanetary dust）： 小于流星体。
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Meteoroid Environment Office 流星体环境研究室
meteoroid detection satellite 流量体探测卫星
Meteoroid protection 流星防护
lunar meteoroid [天] 月球流星体
Meteoroid Stream 流星体流 ; 流星体带
meteoroid impact 宇宙尘碰撞
meteoroid d 流星体
meteoroid dust cloud 流星尘云
N any of the small celestial bodies that are thought to orbit the sun, possibly as the remains of comets. When they enter the earth's atmosphere, they become visible as meteors 流星
An even smaller type of interplanetary debris is the meteoroid.
有一种更小的星际碎片，是流星体。
When a meteoroid enters the atmosphere, it compresses the air in front of it.
当流星体进入大气层，它压缩的空气在前面的。
The cometary ejection play a crucial role in formation and evolution of the meteoroid stream.
彗星的喷发速度在流星群的演化过程中起着重要作用。
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