How many stars are there in the universe and how many stars are there in the universe?

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 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.

In the clear night sky, the sky is full of stars and twinkles, densely packed, and there are almost too many to count. Are you really too many stars to count? Astronomers tell us that the stars in the sky that can be seen with the naked eye can be counted.

Astronomers divide the stars in the sky into 88 regions, that is, 88 constellations; According to the brightness of the stars, the stars are divided into grades, the brightest is the 1st magnitude star, the 2nd magnitude star is darker than the 1st magnitude star, and the 3rd magnitude star, the 4th magnitude star, the 5th magnitude star, the 6th magnitude star is the faintest star that can barely be seen by the naked eye.

Astronomers tell us that after counting a constellation, counting another constellation, and counting the stars in each constellation according to their rank, we find that there are 20 stars of first magnitude, 46 stars of second magnitude, 134 stars of 3rd magnitude, 458 stars of 4th magnitude, 1476 stars of 5th magnitude, and 4840 stars of 6th magnitude. In total, there are 6,974 stars visible to the naked eye in the sky.

If we look at it with an ordinary astronomical telescope, we can find more than 50,000 stars, and the largest astronomical telescope in modern times, can see more than 1 billion stars. In fact, the number of stars in the sky is far more than that, and some planets are so far away from the Earth that even the largest astronomical telescopes cannot find them. Some distant galaxies, in huge astronomical telescopes, are just vague specks of light, but they contain hundreds of millions of planets.

The universe is endless, and modern astronomy can see only a small part of it. How many huge galaxies there are in the universe, and how many galaxies have not yet been discovered, are still a mystery that has not yet been solved.

How many stars are there in the sky?

Nature: 30000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

It is often said that the sky is full of stars. How many stars are there in the sky? The 1st issue of the journal Nature gives the answer: about 3 followed by 23 zeros. For those who like to look up at the stars, counting the stars will be a lot of work.

Peter Van Dowkun, an astronomer at Yale University in the United States, and Charlie Conroy, an astrophysicist at Harvard University, analyzed the intensity of light from galaxies and concluded that the number of galactic red dwarfs was far greater than previously thought.

Previously, astronomers estimated that the number of stars in galaxies was about a trillion times that of 100 billion. This theory is based on the work of Carl Sagan, an astronomer at Cornell University in the United States. Sagan once wrote a best-selling book called "A Hundred Billions of Billions."

He believes that there are 100 billion galaxies in the universe, and each galaxy has 100 billion stars.

After observing distant galaxies in Hawaii with the help of electron telescopes, Van Dokun and his team found that the stars of these distant galaxies were many times or even dozens of times larger than previously thought. "We see 10 to 20 times as many red dwarfs as we do," Van Dokun said. Conroy said that 3 is followed by 23 zeros, which is an astronomical number even for astronomers who calculate distances in light years.

To illustrate the size of the number 23 zeros after 3, Conroy said that each person has about 50 trillion human cells, and there are about 6 billion people on the earth, and the product of the two is exactly 23 zeros after 3. In other words, the stars in the sky are comparable to the total number of human cells on earth.

In addition, Van Dokun and Conroy found that only one-third of galaxies are elliptical like the Milky Way.

n Countless pieces

Real number (does not exceed the range of real numbers).

Multiple several

First investigate how many stars there are in each galaxy, there are 10 million galaxies in the universe, and do the math yourself.

Because you don't have a bounty point, none of them will come to you. Ahem, the person now is one word - greed! ）

I don't know how big the universe is, how to answer.

Make no mistake

I think it's too many to count!

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. As long as we have patience and count the stars in one constellation, we can count the stars that can be seen with the naked eye.

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 ...... of 6th magnitudeNo more than 7,000 in total.

If we use a telescope, the situation is different, and even with a small astronomical telescope, more than 50,000 stars can be seen. The largest modern astronomical telescope can see more than 1 billion stars.

In fact, the number of stars in the sky is much more than that. The universe is endless, and what modern astronomers see is nothing more than a tiny, tiny part of the universe.

There are as many stars in the sky as cow's hair, and they are innumerable.

Because the universe is infinitely large, there are infinitely many stars in the universe, of which more than 6,000 are visible to the naked eye.

Trivia: How many stars are there in the universe?

In fact, you know best how many stars you have, you can count as many as you want, not too many, not too many. The key depends on how many you count.