Why can ancient people watch astronomical phenomena at night? What is the secret?

There is little scientific basis, but it embodies China's earliest astronomical theory. The essence of the so-called night astrology is to predict the future according to the position and brightness of the constellation. Some people think this is all a lie, but we can't explain the predictions of some famous people in history, such as Dongfang Shuo and Liu Bowen. Of course, among them, the divination of 16 is really amazing. During the alternation of Shang and Zhou Dynasties, Zhou Wenwang's divination of Zhantian 16 (only 8 divinations left in later generations) was amazing, some of which were not mentioned in the official history, but in many works handed down from generation to generation, such as Dongfang Shuo and Zhuge Liang, it was mentioned that it was influenced by Zhou Wenwang's divination of Zhantian 16, which was basically the same. Stargazing at night is a kind of ancient people.