Can we humans determine how many stars there are in the sky?

Yes, scientists have confirmed that there are countless stars in the sky.

There are 6,974 stars visible to the naked eye in the sky. According to the calculations of astronomers: 6 stars of magnitude 0; 14 stars of 1st magnitude; 46 stars of 2nd magnitude; 134 stars of 3rd magnitude; 458 stars of 4th magnitude; 1476 stars of 5th magnitude; 4,840 stars of 6th magnitude; A total of 6,974 stars can be seen with the naked eye.

Astronomers divide the stars in the sky into 88 constellations according to their regions.

Among them, the northern sky, bounded by the celestial equator, has 29 constellations; There are 46 constellations in the southern sky and 13 constellations in the north and south of the celestial equator. More than 2,000 years ago, people divided the stars seen by the naked eye into 6 grades according to their brightness, and called the brightness level unique to this astronomy as magnitude, with very bright stars being 1st magnitude stars and just visible to the naked eye being 6th magnitude stars.

Modern astronomy continues this tradition and clearly states that for every magnitude difference, the brightness varies by about a factor of two. It is also specified that a star that is brighter than a star of the 1st magnitude is a star of magnitude 0, and a brighter star is represented by a negative number.

Words to describe a lot of stars

1. Starry: There are many stars in the distant night sky, shining brightly. The night sky and stars are far away, and its extended meaning is that there are too many things to count.

2. Starry sky: Stars in the sky.

3. Scattered: Distributed like the stars in the sky and the chess pieces on the chessboard. There are many descriptions and they are widely distributed.

4. Starry sky: Starry, a lot of stars. There are many stars in the night sky.

5. One day starry: The sky is full of stars. The metaphor is that things are many and messy.

6. 10,000 stars: Describe the number of stars in the sky.

How many stars are there in the sky?

To be exact, there are a total of 6,974 stars visible to the naked eye.

More than 2,000 years ago, astronomers lined up the stars according to their brightness, calling the brightest ones "1st magnitude stars", the lesser ones "2nd magnitude stars", "3rd magnitude stars", and so on. The faintest star that can be seen by the naked eye is a star of magnitude 6. In fact, in the entire sky, there are only 21 stars of 1st magnitude and above, 46 stars of 2nd magnitude, 134 stars of 3rd magnitude, 458 stars of 4th magnitude, 1476 stars of 5th magnitude, and 4840 stars of 6th magnitude.

From the 1st to the 6th magnitude stars, there are 6,974 stars in total, and even if you add planets such as Mercury, Venus, Mars, Jupiter, and Saturn, and the Sun, there are only 6,974 stars. Of course, this is limited to the stars visible to the naked eye, not the actual number of stars in the sky.

For example, a small binoculars can see about 7 8th magnitude stars, and 14th magnitude stars can be seen with a 120 (120 mm lens diameter) telescope manufactured by Nanjing Astronomical Instrument Factory; If you use the 5-meter telescope on Palomar Mountain in the United States, you can see 21 magnitude stars, which is about to be nearly 2 billion. In fact, even if you use an astronomical telescope with a diameter of 5 meters to observe the stars, you can only see a drop in the ocean. The stars in the vast universe are actually innumerable.

Only the Milky Way, where our Sun is located, is generally estimated to contain 15x10" is about 150 billion stars, and humans have observed dozens of such "galaxies" with current observation methods.

Stars refer to celestial bodies in the universe that are visible to the naked eye. The activity of the energy inside the star makes the star irregularly shaped. Stars can be broadly divided into planets, stars, comets, white dwarfs, etc.

The brightness of a star is often expressed in terms of magnitude. The brighter the star, the smaller the magnitude. The brightest planet is Venus, the fastest star orbiting at more than 240 kilometers per hour, and h1504+65 is the hottest white dwarf.

The total number of stars visible to the naked eye is just over 6,000.

According to statistics, the total number of stars that can be seen with the naked eye is only about 6,000, and because people standing on the earth can only see half of the sky above their heads at most, we usually have about 3,000 stars that can be observed by the naked eye at the same time in the same place, and most of these stars are quite close to us.

There are 6,974 stars (of magnitude and above) visible to the naked eye throughout the day, excluding the Sun, the Moon, Mercury, Venus, Mars, Jupiter, Saturn, Europa, and supernovae. There are about 200 billion stars in the Milky Way and about 700 trillion stars in the universe

Classification of stars:

1. Stars are divided into types: stars, planets, satellites, dwarf planets (this classification is only in the solar system), small celestial bodies (asteroids, comets, etc.).

2. Stars are divided into stages: novae, main-sequence stars, red giants, and supernovae (divided into the following types) 1. White dwarf, 2. Neutron star; 3 black holes.

3. Stars are divided by size: (maroon-red) dwarfs, (blue, blue-white, yellow, red) giants, (blue, red) supergiants.

4. Stars are divided into o, b, a, f, g, k, m and additional types such as r, n, and s according to the spectrum.

5. Stars are divided into combinations: single stars, double stars, clusters and star clusters.

6. Other classifications of stars: non-variable stars, variable stars.

7. Variable stars are divided into: Cepheid variable stars and eclipse variable stars.

8. Planets are divided into Jupiter-like planets and terrestrial planets according to their composition and volume.

How many stars are there in the sky? This is a question that no scientist has been able to do with precision so far. However, recently there has been a relatively accurate answer:

There are about 7 by 10 stars to the 22nd power in the universe. This figure was calculated by Professor Simon Driver and his team at the Australian National University's Institute of Astronomy and Astrophysics.

Using the world's most advanced radio telescope, Professor Simon Driver and his research team first calculated how many galaxies there were in a space closer to Earth. Then, by measuring the brightness of the galaxies, it is possible to estimate how many stars there are in each galaxy. Next, based on this number, we can deduce how many stars there are in the visible universe.

Experts believe that this is the most advanced calculation method to date.

While the international astronomical community spoke highly of the results of this research, Professor Simon Driver said: The 22nd power of stars of 7 times 10 is not the number of stars in the entire universe, but a relatively accurate number calculated within the reach of modern telescopes, and the real number will be much larger than this.

Counting the number of stars in the sky is still up to future generations.