What is the relationship between astronomy and meteorology?

In ancient China, when describing a learned person, it was often said that he "knew astronomy above and geography below", and "knowing astronomy above" included knowledge of astronomy and meteorology. At present, many people are still affected by this and can't figure out the relationship between astronomy and meteorology. In ancient times, all natural disciplines were in their infancy, and it was common for two or more natural disciplines to be mixed together. The ancients thought that astronomy and meteorology were all about "heaven", so it is not surprising to mix them together. However, now astronomy and meteorology have made great progress and have formed two different disciplines. Astronomy is the science of studying celestial bodies, mainly studying the movement of celestial bodies, the interaction between celestial bodies, the physical conditions of celestial bodies themselves and their ins and outs. When the earth is regarded as a planet in the solar system, it is also regarded as a celestial body, so it is also the research object of astronomy. Meteorology studies the earth's atmosphere. If you read this volume "100,000 Why" (New Century Edition) and the earth science sub-volume, you will have a clear understanding of the research objects of astronomy and meteorology. Since astronomy and meteorology are two different sciences, are they completely unrelated? Not exactly. The change of weather is mainly caused by the movement of the earth's atmosphere, but some astronomical factors may also have some influence on the change of weather, among which the activity of the sun may have a very important influence on the long-term climate change of the earth. Like a.d. 1645? 70 years between 17 15 and 1460? These 90 years (1550) are continuous minimum periods of solar activity, which are consistent with the two cold periods of the earth. At that time, the global average temperature dropped by 0.5? It; The maximum period of solar activity in the middle ages was also consistent with the warm period of the earth at that time. In addition to the sun, there are also some celestial bodies that have an influence on the weather changes on the earth. Some people think that the gravity of the moon and the sun not only produces the tides of the oceans on the earth, but also causes the tides of the earth's atmosphere, which affects the atmospheric circulation. The meteors we see at night also have an influence on the weather. For example, there are two conditions for rain: first, there is enough water vapor in the atmosphere; Second, there are certain dust or charged particles, which act as condensation nuclei for water vapor to condense into raindrops. After the meteor burns in the atmosphere, it leaves a lot of particles as condensation nuclei, which promotes the formation of raindrops. If we understand the influence of these astronomical factors on weather changes, we can use astronomical research results to improve long-term weather forecast. Working people in our country have accumulated rich experience in weather forecasting in the long-term production struggle, and some agricultural proverbs of weather forecasting are compiled according to astronomical factors. Astronomical observation should also have certain weather conditions, such as rainy days and cloudy days, and optical telescopes cannot be used. Therefore, accurate weather forecast is also helpful for astronomical observation and research.