How many galaxies are there in the universe? How many galaxies are there in the universe

There are about 125 billion galaxies that have been discovered and observed, and each galaxy has hundreds to trillions of stars like the Sun. So with a simple math problem, it's not hard to see how many stars there are in the universe that we've observed. In such a vast universe, the earth is really like a drop in the ocean, so small that it is insignificant.

Galaxies: In the vast cosmic ocean, there are thousands of "islands", dotted with countless stars and various celestial bodies, called galaxies in astronomy. The Earth we live in is in a huge galaxy called the Milky Way.

In the universe beyond the Milky Way, there are hundreds of millions of space islands like the Milky Way, which are collectively known as extragalactic galaxies.

In astronomy, we call this celestial system, which is composed of hundreds of billions of stars and interstellar gases, cosmic dust, and other materials distributed between them, occupying a distance of hundreds of billions of light-years. Our Sun is just an ordinary star in the Milky Way.

The Milky Way is not the only galaxy in the universe: tens of thousands of galaxies have been observed by various means! However, due to the distance, they look far less magnificent than the Milky Way. With the help of telescopes, they look.

It's just like a hazy cloud. The closest galaxies to our Milky Way, the Large Magellanic Cloud and the Small Magellanic Cloud, are also more than 100,000 light-years away from our Milky Way. In general, we refer to galaxies other than the Milky Way as "extragalactic galaxies".

The shapes of galaxies are varied. We can roughly divide into five types: elliptical galaxies, lenticular galaxies, spiral galaxies, barred spiral galaxies, and irregular galaxies. Galaxies are also not evenly distributed in space, often clustered into clusters.

A few come in groups of threes and twos, and a large number may be in hundreds. They are also known as "galaxy clusters".

Many areas of the universe are not absolute vacuums, and interstellar space is filled with interstellar matter. The distribution of interstellar matter is very uneven, with areas with a higher density of cosmic dust matter (which is still much smaller than the laboratory vacuum on Earth) observed as foggy spots, called nebulae.

There are mainly two types: "bright nebula" and "dark nebula".

There are more than 100 billion galaxies in the universe. In the observable universe, the total number of galaxies may reach more than 100 billion (1011). Most galaxies are between 1,000 and 100,000 parsecs in diameter and in the order of millions of parsecs from each other.

Intergalactic space (the space that exists between galaxies) is filled with extremely thin plasma, with an average density of less than one atom per cubic meter. Most galaxies are organized into larger groups, known as groups or clusters, which in turn aggregate into larger superclusters. These larger groups, often referred to as large-scale fibrous structures, are distributed around huge holes in the universe.

The oldest galaxy.

In January 2012, an international astronomical research team led by American scientists also announced in the British journal Nature that the Hubble Space Telescope had discovered the oldest galaxy, which was born in the first 100 million years of the universe, and the newly discovered ancient galaxy was born in the first 200 million years of the universe, 100 million years longer than the former.

The galaxy was discovered by a team led by John Richard from the Lyon Observatory of the University of Lyon in France, who discovered the galaxy using the Hubble Space Telescope and the Spitzer Space Telescope in the United States, and then measured it at a distance of 12.8 billion light-years from Earth using instruments from the Keck Observatory in Hawaii, indicating that the galaxy was born at least 12.8 billion years ago.

Further study of the galaxy's spectrum revealed that the earliest stars in the galaxy were 100 million years old, leading researchers to conclude that the galaxy was born 100 million years ago. The results were published in the Monthly Notices of the Royal Astronomical Society.

There are more than 100 billion galaxies in the universe. According to their shape and structure, they can be divided into: spiral galaxies, barred spiral galaxies, elliptical galaxies and irregular galaxies.

The total number of extragalactic galaxies is estimated to be more than 100 billion. The most common classification of extragalactic galaxies was proposed by Hubble in 1926. The discovery of extragalactic galaxies has expanded human understanding beyond the Milky Way galaxy for the first time, and is an important milestone in the process of human exploration of the universe.

Galaxies, also known as extragalactic galaxies, are galaxies that are made up of a large number of stars outside the Milky Way. Because of the distance, it appears as a vague point of light on the surface, so it is also called the "extragalactic nebula". Extragalactic galaxies, like the Milky Way, are made up of a large number of stars, star clusters, nebulae, and interstellar matter.

About 1 billion galaxies similar to the Milky Way have been observed.

Since the invention of telescopes in the early 17th century, human vision has expanded to the depths of the universe farther and farther, and astronomers have discovered some cloud-like objects, known as "nebulae". Some "nebulae" are gaseous, while others are thought to be cosmic islands of many stars, like the Milky Way.

Because they are so far away from Earth, they can't distinguish the hazy objects made up of a large number of stars. In the 18th century, the German philosopher Immanuel Kant and the British astronomer Wright and others speculated that these nebulae were cosmic islands composed of asterisms like the Milky Way, and they were too far away to distinguish individual stars. The discovery of extragalactic galaxies dates back more than 200 years.

There are currently about 125 billion galaxies observed by humans. But this value is only observed by humans. The universe is vast, how many galaxies are there in the universe? Not yet.

The universe is just too big. There are 125 billion galaxies, each with hundreds to trillions of stars. There are about 400 billion stars in the Milky Way galaxy alone. The Solar System exists in the galaxy Milky Way.

Galaxy.

According to scientists' estimates, the universe we live in is composed of nearly 100 billion galaxies. First of all, our Earth is in the solar system, and the solar system is in the Milky Way. Galaxies like the Milky Way can reach as much as 100 billion in space.

Secondly, our space is still gradually expanding and expanding, and the nebula is also constantly producing perseverance. In other words, the galaxies we have estimated are not a fixed number, and they are still increasing.

There are countless galaxies in the universe like galaxies, and there are many galaxies that are several times or even dozens of times larger than the Milky Way. For example, if we look far enough to find the best vantage point at the edge of the universe, you will see that the galaxies in the universe are knots, but you can't see the Milky Way, because they are too small and too small, and they will slowly form filaments at a distance. And these filaments are made up of countless galaxies and stars.

So how many galaxies you say there are really can't be imagined.

There is no way to know for sure the number of stars in the universe, but the number of stars given in the literature is often between 1022 and 1024.

One way to do this is to estimate the number of galaxies in the universe and multiply it by the number of stars in an ordinary galaxy.

A reasonable estimate is that there are 100 billion ordinary galaxies in the universe, and every ordinary galaxy has 100 billion stars.

This gives the calculation that there are 10 22 stars in the universe.

This can only be said to be endless, mankind has now discovered 1 billion extrasolar galaxies, but the galaxies discovered now are only the tip of the iceberg in the universe.

Hundreds of billions to trillions are possible, you must know that the number of stars in a single galaxy is not clear, one by one, one counts a second, one counts hundreds of years can not be counted, so you can only observe the number of stars in a few small areas, and then find the average and then add up, the universe has only 13.7 billion years of life, but now the diameter of the universe has exceeded 90 billion light years, the universe is constantly expanding and will get faster and faster without violating the theory of relativity beyond the speed of light, many galaxies have been invisible, and at a faster and faster speed, After a long time, no other galaxies will be visible in the sky, only the stars of the Milky Way.

The universe is bigger than expected. According to the latest data from the Hubble Space Telescope, astronomers estimate that there are at least 2 trillion galaxies in the universe, which is dozens of times more than the previously estimated 1000-200 billion galaxies. And we haven't seen the vast majority of these galaxies because they are very small, faint, and distant.

Co-authors of the study.

1. Astrophysicist Christopher Conselice said it was unbelievable that more than 90% of the galaxies in the universe were still to be studied.

For astronomy, the question of how many galaxies there are in the universe is a fundamental one. Humanity still knows about 90% of the galaxies in the universe, and perhaps the next generation of space telescopes will allow us to see farther and explore the universe further, and maybe even discover some strange celestial objects.

Previously, astronomers had estimated the number of galaxies based on images of the Hubble deep space field. However, the area covered by Hubble's deep space is so small compared to the vastness of the universe that the number of galaxies in the universe is underestimated.

To do this, in the new study, astronomers combine new mathematical models to calculate other galaxies that have not yet been observed in telescopes. As a result, there are at least 2 trillion galaxies in the universe.

Hubble Ultra Deep Field

Looking farther into the depths of the universe also means being able to go back in time to see the distant past of the universe, because it takes a long time for light to travel through the vast universe to reach us. In the course of this research, astronomers also observed the universe 13 billion light-years away. 13 billion years ago, the universe was still very young at that time, and it was only 1 billion years after experiencing the universe.

Astronomers have discovered that there were more galaxies in the early universe than there are today, more than 10 times the amount of cosmic coefficients in the current universe. Those distant galaxies are very small, faint dwarf galaxies. The discovery was unexpected, meaning that as the universe evolved, many of these dwarf galaxies must have merged to form larger galaxies, making the number of galaxies dwindling.

Perhaps, there is another mechanism of cosmic evolution that we don't know about.

20 trillion 40 trillion billion.

The number of stars in the universe is calculated based on the number of stars in the Milky Way. According to the current state of technology, we are not yet able to see every star in the Milky Way. The visible light telescope can observe stars within a radius of 5,000 light-years with the Sun as the center, while the radius of the Milky Way is 560,000 light-years, the Sun is about 10,000 light-years from the center of the Milky Way, and the farthest galaxy star is 90,000 light-years from the Sun.

According to current extrapolation, there are about 400 billion stars in the Milky Way, with a plus/minus error of 50%, so the number of stars in the Milky Way is 200 billion 600 billion.

There are 100 billion 200 billion galaxies like the Milky Way in the universe. If the number of stars in the Milky Way is calculated at a minimum of 200 billion, the number of stars in the universe is 2 1022 4 1022, or 20 trillion 40 trillion billion.

There are 125 billion galaxies in the universe, and there are hundreds of billions of stars in galaxies (such as the Milky Way).

Our Milky Way is twice as big, and there are even bigger, dozens of times larger than the Milky Way) and there are planets in the stars (there are eight planets in our solar system), the universe is really big, big, bigger, bigger than you think, because the universe is finite and boundless, it has no boundaries, so don't ask how big the universe is.

This is just an estimate, about a trillion level number, a lot of numbers, aqui te amo.

God rules over things within the three galaxies, and the ability to escape beyond the three galaxies is still subject to the development of science and technology. Mankind is in dire need of an artificial sun.

No more than a million, the universe is directly attacked.

The diameter is less than 100 billion light years, and the diameter of the Milky Way is 100,000 light years. 100 billion divided by DU100,000 equals one million. Moreover, most of the space in the universe is vacuum.

Even the closest fairy line to us is 2.5 million light-years away. Its vacuum is equivalent to 25 galaxies. Therefore, the number of galaxies in the universe cannot exceed one million.

And it's much lower than that. Those who say trillions of dollars are just nonsense.

There are n billion galaxies in the universe.

Many, too many to count, mainly the solar system, the Milky Way.

Like the sand on the beach, countless, from the Hubble Space Telescope, casually at an angle, from the deep space lens back can see thousands of bright spots, each bright spot is a galaxy, which contains hundreds of billions of stars, there must be planets around the stars, but because the distance is too far to see, the galaxy we are in is just a dispensable fine sand on the beach!