“认星先从北斗来,由北往西再展开。”小时候,长辈们总是教孩子们辨认北斗星,只要找到了北斗星,就找到回家的路。如今,城市的灯光湮没了星光,许多人开始习惯于借助GPS系统来确定方向。由美国国防部开发的GPS卫星导航系统在全球独领风骚,已经渗透到了我们生活的各个方面。虽然儿时的北斗星光已经 “Star first to come from Beidou, from north to west again. ” "As a child, elders always teach children to identify Big Dipper, as long as the Big Dipper found, they find the way home. Nowadays, the light of the city is annihilated by the stars, and many people are getting accustomed to using the GPS system to determine the direction. The GPS satellite navigation system developed by the U.S. Department of Defense has dominated the world and has infiltrated all aspects of our lives. Although the childhood Big Dipper has been