How to observe the sky at night?

How to observe the sky at night? In fact, the positions of constellations move according to certain rules and correspond to climate changes on the earth. After a long period of experience in observing the astronomical phenomena, the ancient Chinese ancestors discovered: "When the handle of the bucket points to the east, everything under heaven is spring; when the handle of the bucket points to the south, everything under heaven is summer; when the handle of the bucket points to the west, everything below is autumn; when the handle of the bucket points to the north, everything under heaven is spring. "Winter." This is based on observing the position of the Big Dipper at dusk to determine the current season.

Recently, space fans all over the world have learned good news: after "Tiangong-2" has been in orbit for more than two years and is about to be deorbited under controlled conditions, the China Manned Space Engineering Office Jointly announced with the United Nations Office for Outer Space Affairs, 9 projects from 17 countries and 23 entities were selected as the first batch of scientific experiment projects for the Chinese Space Station.

As we all know, the Chinese space station may be the only space station for a long time to come. This marks that we Chinese will serve as the leader and lead the people of many countries to jointly embark on a journey of space exploration. A large number of space fans may have been looking forward to this, but looking back on the long journey of my country's aerospace industry, this achievement is indeed extremely difficult.

If we go back to the Qing Dynasty 200 years ago, or even any feudal dynasty, setting up a device privately to observe the stars in the sky would be a serious crime requiring beheading. Whether in the West or the East, from ancient times to modern times, humans have never stopped exploring and thinking about the sky above them. Western astronomers have long proposed the idea that the earth is a sphere.

And he constantly uses mathematical knowledge to summarize observation data and proposes various models to prove that the motion of celestial bodies is perfect and harmonious circular motion. They regard the laws of celestial bodies as a pure and flawless system, demonstrating the holiness of gods, so much so that they attribute the observed sunspots, comets, and meteors to the earth's atmospheric phenomena.

They are absolutely unwilling to admit that there are extra stars, lest they destroy the sanctity of the nine planetary systems.