指极星

指极星是指北斗七星中的天璇与天枢两颗星。通过天璇与天枢联线的五倍延长线可找到北极星。[1]

指极星联线的延长线指向北极星（勾陈一）

参考资料

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.