What can the Big Dipper and Polaris do to help people? Determine the position

Big Dipper: Distinguish seasons. The Big Dipper appears in different directions in the sky in different seasons and at different times at night, so the ancients decided the seasons according to the direction pointed by bucket handle when he fainted for the first time.

Polaris: Polaris is a very important indicator of field activities and ancient navigation direction, and it is also a constellation from small to large to identify the direction, which plays a very important role in the accurate positioning of the astrophotography and the equatorial observatory in the observation room. Because Polaris is closest to true north, people on earth have been navigating by its starlight for thousands of years.

Extended data related introduction of the Big Dipper.

The Big Dipper is in the Milky Way, and the farthest "Shu Tian" from the earth is 123.6 light years. In fact, at night, all the stars we can see with the naked eye are stars in the Milky Way, which are no more than 8,000 light years away from the Earth. Farther away, only some nebulae and supernovae can be seen by the naked eye at special times.

The Big Dipper is a star with a very special connection shape in the night sky. Night in the northern hemisphere is easy to identify, and it is also the main symbol used to find Polaris, because the extension line of five times the distance between the two stars at the mouth of the Big Dipper is Polaris, and the corresponding direction of Polaris is basically due north.

Because all stars have their own phenomena, the shape of the Big Dipper is not static, but we can't see it with the naked eye in a short time.

Baidu Encyclopedia-Big Dipper

Baidu encyclopedia-Polaris