How many stars are there in the universe, how many stars are there in the whole universe?

Scientists have found that the total number of stars in the universe could be three times the number of our current estimates, which means that there are 3x1023 (10 to the power of 23) stars, which is more than the total number of sand grains in all the beaches and deserts on Earth, which greatly increases the likelihood of extraterrestrial life being found in other worlds other than Earth. The study will be published in the British journal Nature.

Scientists say the number of stars in the universe may have been grossly underestimated, and the true number of stars could be three times as high as now assumed. This underestimation mainly concerns dwarf stars in different galaxies that are cooler and less bright. If confirmed, it could potentially rewrite scientists' understanding of galaxy formation and evolution.

Based on this, they made observations and calculations of eight elliptical galaxies. The results show that the ratio of Sun-like main-sequence stars to invisible dwarf stars in elliptical galaxies is 1000-2000:1, rather than about 100:

1。Thus, a typical elliptical galaxy (generally thought to contain 100 billion stars) should actually contain 1 trillion or more stars. And in the universe, elliptical galaxies account for about one-third of the total number of galaxies, therefore, they concluded:

The total number of stars in the universe is at least three times as high as existing estimates.

You ask how many stars there are, and I'll tell you how true I am.

How much do you know about the starry sky.

About 3 after 23 zeros.

Peter of the American astronomer at Yale University. Fan. Dokun and Charlie, an astrophysicist at Harvard University. Conroy analyzed the intensity of light from galaxies and concluded that there were far more red dwarfs in galaxies than previously thought.

Previously, astronomers estimated that the number of stars in galaxies was about a trillion times that of 100 billion.

Fan. After observing distant galaxies in Hawaii with the help of electron astronomical telescopes, Dokun and his team found that the stars of these distant galaxies were many times or even dozens of times larger than previously thought, and that the size of 3 was followed by 23 zeros. For the sake of the image, Conroy said that there are about 50 trillion human cells in each person and about 6 billion people on the earth, and the product of the two is exactly 3 followed by 23 zeros.

In other words, the stars in the sky are comparable to the total number of human cells on earth.

I don't think anyone will be able to answer this question in 100 years. I remember a story in "Arabian Nights" where a guard asked Sinbad how many stars there were in the sky, and he replied that there were as many grains of sand as under your feet (when he was in the Sahara Desert), but according to an analysis in a scientific journal in 2011, the stars in the sky were expected to have more than the sand in the Sahara Desert. At present, it has been found that there are only about 6,000 stars that can be seen by the naked eye, and about 120 billion stars have been discovered by human beings, and the planets have only observed eight planets and nearly a thousand small stars, comets and moons in the solar system, and Pluto at the edge of the solar system observed by the Hubble telescope can only vaguely illuminate a few pixels.

Countless of them, beyond the Earth-Moon system, the solar system, the Milky Way, and what nebulae and what systems beyond.

Don't dwell on it.

Infinite because the Milky Way is infinite.

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.

The number of stars in the universe is currently unknown.

On a clear night, apart from a few planets and the occasional meteor and comet, there are only about 5,000 stars that can be seen with the naked eye, and all of them are stars in the Milky Way.

Scientists believe that in our galaxy alone, there are more than 200 billion stars. And in the observable universe, there are no less than 200 billion galaxies like the Milky Way, some of which are larger than the Milky Way and have a greater number of stars; There are also some that are smaller than the Milky Way and have fewer stars. Broadly speaking, the number of stars in a galaxy ranges from billions to hundreds of billions.

With an average of 100 billion stars per galaxy, the total number of stars in the observable universe is about 100 billion, 200 billion, 20 trillion 20 billion. It is to add 22 0s to the end of 2.

And that's just the number of stars in the observable universe, not counting the number of planets and other non-luminous objects that may exist around them.

I think play wow, I think the universe um, I think the universe will have, I think the universe will have. Zheng Sheng, Zheng Kexin.

Countless, as far as the current science and technology, mathematical theories, not many counts

As much as the number of human hair roots combined.