“危楼高百尺,手可摘星辰。”“星垂平野阔,月涌大江流。”……诗和远方,寄托了人类对未知的无限?向往。当小行星撞击地球,地球曾经的主宰者恐龙走向灭绝;当哈雷彗星经过,惊恐的古人对“扫把星”唯恐避之不及;当流星划过,人们双手合十许下心愿……对小天体的情愫,已经深深印刻在人们心中。这些存在于茫茫宇宙中的小天体到底有什么奥秘?人类试图从科学的角度进行解谜。本世纪初,美国、日 “Dangerous buildings high hundred feet, hands can pick the stars. ” “Star vertical flat wide, big stream Yongyue.” “... ... poetry and afar, the sustenance of the unknown infinite human longing for mankind. When the asteroid hit the Earth, the Earth’s former dominator, the dinosaurs, went extinct. When Halley’s comet passed the horrified ancients on the ”Broom Star," fearing to avoid it. When the meteors crossed, people would both wish Celestial things, have been deeply engraved in the hearts of people. What are the mysteries of these small celestial bodies that exist in the vast universe? Human beings try to solve the mystery from a scientific point of view. The beginning of this century, the United States, Japan