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

They always say that there are too many stars in the sky, but in fact, all the stars that can be seen with the naked eye can still be counted.

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.

More stars can be seen with a telescope, and the larger the aperture of the telescope, the more stars you can see. For example, 40,000 stars can be seen with a 3-centimeter telescope and 3 billion with a 5-meter telescope. However, there are so many stars in the universe, there are 200 billion in the Milky Way alone, so no matter how large the aperture of the telescope, it is impossible to figure out how many stars there are in the universe.

In fact, the number of stars in the sky is much more than that. The universe has not yet been discovered, and what modern astronomers see is only a tiny, tiny part of the universe.

The number of stars in the universe is calculated based on the number of stars in the Milky Way.

With current technology, we can't see every star in the Milky Way. Visible telescopes can observe stars within a radius of about 5,000 light-years from the Sun, while the Milky Way has a radius of 5 6

10,000 light-years, the Sun is about 10,000 light-years from the center of the Milky Way, and the farthest galaxy star from the Sun is 90,000 light-years. 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.

The list goes on and on. That's true. Our galaxy is home to about 40 billion planets. If you count 10 planets per second.

It would take more than 1,000 years to count without interruption. Therefore, it is impossible to count how many planets there are in the universe.

Because so many planets are so far away from us, we can't see them, only the galaxies they are in. It's like we can.

I saw woods several kilometers away, but I couldn't see the leaves clearly.

There are hundreds of billions of galaxies in the universe, and each galaxy is made up of tens of billions of planets. The total number of planets in the universe is about 1 trillion billion.

1 followed by 20 zeros). Keep in mind that this is just an estimate!

In the solar system, there are 9 major planets, more than 60 moons and hundreds of thousands of asteroids, etc., and it is estimated that there are millions of celestial bodies in total. In the Milky Way, there are about 10 million stars. As for what the center of the galaxy is, it is not yet in this statistical range.

And galaxies like the Milky Way, there are hundreds of millions of them in the universe. And the progress of mankind has never stopped. So, if according to Hubble's theory, the universe is assumed to have boundaries, then it is estimated that there are tens of billions of galaxies.

Each of them has more than 100 billion stars. Moreover, there are nebulae, neutron stars and other celestial bodies in the galaxy, so it is difficult to give an exact number.

Up to now.

Only more than 400 billion have been discovered.

However, this number will increase.

The total number of planets in the universe is about 1 trillion (1 followed by 20 zeros). We have about 40 billion planets in the Milky Way, and so many of them are so far away that we can't see them, only the galaxy they're in.

There are about 700 trillion stars in the entire visible universe, and he said that this is "the most accurate observation data so far in 2018". Simon Driver, Ph.D. from the Australian National University's School of Astronomical and Astrophysical Studies, reported that his research team used the most powerful astronomical telescope in the world to select a region of space near the Earth for local observations, and then calculated the number. If you want to literally represent this number, you need to add 22 "0s" after the "7".

There are 2 trillion planets in the universe. The real existence of the universe shows that it must have its own organizational components and basic appearance, and in recent years, domestic scholars have used mathematical methods to synthesize classical fields and quantum mechanics. On the basis of the theory of relativity and the gravitational field, an expression that reflects the composition of the universe and its fundamentals is proposed.

A planet defines a celestial body, b orbits a star, c has its own gravitational force sufficient to overcome its rigid force to make the body spherical, and d is capable of clearing other objects near its orbit. Eligible for this new definition include eight planets that could be observed in 2000: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The definition of a dwarf planet cannot clear other objects in the vicinity of its orbit, e is not a satellite.

Fit this definition includes Ceres, Pluto, Eris, Ortoris, and Sedna, for a total of five. The definition of a small celestial body in the solar system, a celestial body, b orbiting the sun, c does not meet the definition of planets and dwarf planets. The original asteroids, comets, etc., are all classified as small bodies in the solar system.

No one knows the exact number.

Let's start with the stars. Stars are all present in galaxies. The number of stars in large galaxies is roughly between 200 billion and 600 billion, and the Milky Way is a large galaxy with about 200 billion and 400 billion stars.

The Andromeda Galaxy is larger than the Milky Way, with about 600 billion stars in it. The number of stars in small galaxies is relatively small, ranging from hundreds of thousands to hundreds of millions. On average, the number of stars in a galaxy is roughly around 200 billion.

The number of galaxies in the observable universe is likely to be around 200 billion.

According to this calculation, the number of stars in the observable universe is roughly 200 billion times 200 billion, which is 22 zeros after 2.

There are also many planets in the universe that do not shine and heat, such as planets and smaller smaller planets. According to the current theory of star formation, there may be an unequal number of planets around a single star, with an average of 5. Most stars in the universe exist in pairs, with only about 25% of the stars being single.

According to this calculation, the number of invisible planets in the observable universe is roughly the same as the number of stars, which is also as much as 2 followed by 22 zeros.

In addition to stars and planets, there are invisible black holes in the universe, and there are many planets smaller than planets, such as moons, etc., the number of which cannot be counted, or even estimated. So, the number of planets in the universe is really not calculated, there are too many.

There are trillions of planets in the universe. Even the current advanced science cannot accurately calculate how many planets there are in the universe, and even if we know the approximate calculation data of the solar system or the Milky Way, the real mysteries of the universe will of course take time to truly understand. Humanity is only one small step to complete.

Now the largest. The stellar constellation in the Milky Way contains hundreds of billions of stars. Beyond the Milky Way.

The wider universe has no time or borders. Universe Narrative: The universe is physically defined as all space and time, collectively known as space-time and its connotations. The Great Theory is a modern cosmological description of the evolution of the universe.

According to the estimation of this theory, space and time appeared together after the great ** of 100 million years ago, and as the universe expanded, the energy and matter that originally existed became less dense. The initial accelerated expansion is known as the inflationary period, after which the four fundamental forces known separate.

According to the observations of scientists, the number of stars, planets, moons and other planets in the universe adds up to about 2 trillion. But because many planets are so far away from Earth, only their galaxies are currently visible, and there are about tens of billions of planets in each galaxy. How the universe came to be.

Many scientists believe that the universe was formed about 13.8 billion years ago by a large **, which physicists called "quantum physics". It is speculated that the big ** makes the matter scattered, the space of the universe continues to expand, and after the temperature drops, galaxies, stars, planets and so on in the current universe have appeared one after another. The "Great ** Cosmology" was proposed by the Belgian mathematician Lemaître in 1927, and this theory is one of the most influential theories in modern cosmology.

There are countless planets in the universe.

How big the universe is still unknown, and the planets that exist in it are even more unknown.

There are very, very many planets in the universe, such as the Earth where we live, as well as Oris, Neptune, Uranus, and Mercury.

1. Oriza is the third largest known dwarf planet in the solar system and one of the two largest objects in the classical Kuiper belt.

2. Neptune: It is the far solar planet among the eight planets, Neptune is the eighth planet in order of the distance between the planets and the sun, the fourth largest planet in diameter, and the third largest planet in mass.

3. Uranus: Uranus is the coldest planet in the solar system, with a minimum temperature of only 49K (-224). The main components of Uranus' atmosphere are hydrogen, helium, and methane. It is speculated that the interior may be rich in heavy elements;

4. Mercury: It is the innermost and smallest planet of the eight planets in the solar system, and it is also the closest planet to the sun.

There are about 700 trillion trillion planets, or 1,022 planets, in the entire visible universe.