The composition of Polaris in my heart is 600 words

Polaris in my heart. Polaris is a famous star. Everyone wants to know it. Finding the North Star is to find the true north direction, which is not only useful for people who often work in the field, such as aviation, navigation, surveying and mapping, geological exploration, but also indispensable knowledge for us. Facing the northern sky, you can see two famous constellations: Ursa Major and Cassiopeia. These two constellations are easy to recognize. Ursa major has seven bright stars: Shu Tian, Tian Xuan, Tianji, Tian Quan, Yuheng, Kaiyang and Yaoguang. They form the shape of a spoon. Some people call it the spoon star, which is generally called the Big Dipper. The five main bright stars in Cassiopeia form the phonetic letter W. These two constellations can help us find the North Star. The positions of Ursa major and Cassiopeia in the sky are just opposite each other across the Polaris. For those of us who live in the mid-latitude area of the northern hemisphere, in spring, shortly after dark, the Big Dipper is in the northeast and Cassiopeia is in the northwest; In May and June, shortly after dark, the Big Dipper appeared near the top of the head, and Cassiopeia was near the true north horizon. In other months, when Cassiopeia is in the northeast and close to the top of the head, it is the turn of the Big Dipper to approach the northwest and north horizons. Source: Reading and Composition (Senior Primary School Edition)