Big Dipper
The Big Dipper is made up of seven bright stars of Ursa Major. Arched in the north days into a bucket (or spoon) shape, often as an indicator of the direction and understanding of the constellation of important signs. Because the seven stars are more easily identified by the stars, so become a clear and important stars. Beidou Qixing name first seen in the Han Dynasty Weishu "Spring and Autumn transport bucket pivot": "The first day pivot, the second Xuan, the third group, the fourth right, the fifth Yu Heng, the sixth Kaiyang, seventh Yao light. To the fourth for the Quebec, fifth to seventh for the standard, together for the fight. Beidou seven star of the Chinese star name from the bucket to the bucket jumping order for the Tianshu, Tian Xuan, Tian Ji, Tian Quan, Yu Heng, Kai Yang and Yao light. The first four are called "bucket kui", there is called "Xuanji"; after the three called "bucket". Modern star names are named Ursa Major α, Ursa Major Beta, Ursa Major, Ursa Major, Ursa Major, Ursa Major, ζ and Ursa Major η. Through the mouth of the two stars connected to the direction of the bucket to extend the direction of 5 times can be found in the North Star, the two also known as "refers to the polar stars." ...