How many moons and stars are there in the sky?

A moon, people always say that there are countless stars in the sky. In fact, all the stars visible to the naked eye can still be counted clearly. Astronomers divide the stars in the sky into 88 constellations by region. Among them, there are 29 constellations in the northern sky (bounded by the celestial equator); There are 46 constellations in the southern sky and 13 constellations across the celestial equator. As long as we are patient, we can count the stars in one constellation and then the next constellation, so that we can count the stars that can be seen by the naked eye. According to the results calculated by astronomers, there are 6 stars of magnitude 0; 1 Isometric14; 46 second-class stars; 3 stars134; 458 4 stars; 5 stars1476; There are 4,840 6-level stars ... * * * The total number of people does not exceed 7,000. If we use binoculars, the situation will be different. We can see more than 50,000 stars even with a small telescope. The largest astronomical telescope in modern times can see more than 654.38 billion stars. In fact, there are many more stars in the sky. The universe is endless, and what modern astronomers see is only a tiny part of it. Responder: Flying Eagle-Manager Level 51-5 06: 36 The total number of stars visible to the naked eye is only about 6,000, but the number of stars visible through the telescope is much more. Does this mean that they are countless? Stars in the direction of the Milky Way are very dense, while those in other directions are relatively rare, which means that we must abandon the whole concept of stars forming spherical structures. In that case, there should be as many stars in all directions as there are in the direction of the Milky Way. Under the background of weak light, the closer stars twinkle (not as spectacular as it is now), and the whole sky will be illuminated. Then, we must assume that stars exist in large aspherical clusters and extend farther in the direction of the Milky Way than in other directions. In this case, the Milky Way galaxy shows that all the stars gather in the shape of a lens or hamburger. This lens-shaped cluster is called the Milky Way (Greek explanation comes from the Milky Way), and the name of the Milky Way has been preserved because of the dark light band around the sky we see. The first person to suggest that stars exist in shadow galaxies is Thomas, a shadow astronomer. Wright. He put forward this suggestion in 1750, but his ideas were so confusing and incomprehensible that few people paid attention to him at first. Of course, even if the Milky Way is lens-shaped, it can always extend in the long diameter direction. Although only a few stars can be seen outside the Milky Way, there are countless stars inside the Milky Way. To illustrate the problem, William. Herschel counted the stars. It is naturally impossible to count all the stars in a certain period of time. Herschel chose 683 small areas, evenly distributed in the sky, and then counted the stars seen through the telescope in each area. In this way, he got the number of stars that we now call "imaginary voting" in the sky. This is the first example of the application of statistics to astronomy. Herschel believes that the number of stars in each region is related to its proximity to the Milky Way. In all directions, the number of stars increases steadily as they approach the Milky Way. From the number of stars he counted, we can estimate the number of stars in the Milky Way and the possible size of the Milky Way. 1785, he announced the results, and proposed that the long diameter of the Milky Way is about 800 times the distance from the sun to Sirius, and the short diameter is 150 times this distance. Half a century later, after calculating the actual distance between Sirius and Sirius, it can be concluded that Herschel thinks that the long diameter of the Milky Way is 8000 light years and the short diameter is 1500 light years. At the same time, he calculated that there are 8 billion stars in the Milky Way. Although this is a huge number, it is not uncountable. In the past two centuries, astronomers have explored the Milky Way with much better instruments and techniques than Herschel can use. Now they know that the Milky Way is much bigger than Herschel expected. It extends at least 654.38 million+light-years in the long diameter direction and may have 200 billion stars. However, it can be said that we have confirmed that galaxies and stars are not numerous but computable, thanks to Herschel. Interviewee: The position on the left-Chief Operating Officer1Level 3 4-27 17:2 1 There are as many stars as there are in the universe. The exact number can't be determined by current science, so it can only be described as tens of billions. Interviewee: Xiao Yi-Assistant Level 2 4-27 17:2 1 In today's telescope. If we observe and calculate with the naked eye, we may count 6000 stars in the whole sky. Since we can only see half of the night sky and the other half of the day when we observe the starry sky at night, we can only count 3000 stars. You can see more stars with a telescope. The larger the aperture of the telescope, the more stars you can see. For example, a 3 cm telescope can see 40,000 stars, and a 5 m telescope can see 3 billion stars. However, there are too many stars in the universe. There are 200 billion stars in the Milky Way alone, so no matter how big the telescope is, it is impossible to calculate how many stars there are in the universe.