Currently, how many planets are there in the known universe?

There are currently 200 billion galaxies in the universe that our best telescopes can see. And galaxies (such as our Milky Way, because there are more galaxies 60 times larger than the Milky Way, there are more stars in there) have 200 billion stars, nebulae, dust, black holes, etc., and stars (such as our solar system, and some stars have no planets) have 8 planets. You can have as many planets as you want.

And the places that we can't see with the telescope are all dark, because the telescope can't see those places, and if we want to see those places, we have to use better telescopes, which are on the ground, not in the sky, and maybe they will come out later.

Well, that's all, I hope it can help you.

For the time being, we have to understand that there is an infinite number (because there is still a large part of the universe that we don't know, and how many parts of the unknown part we don't know, and all that we know can be observed are nearby, in the Milky Way).

Because the total mass of planets usually accounts for less than 1% of the mass of a star system, and it will change in size with the change of orbit and other factors, just as our solar system already knows that there are 8 planets of different sizes, and no one dares to say whether there are any. And there are countless star systems in the Milky Way galaxy where planets may exist, so we can think of it as infinite at this stage of science.

Even the definition of planets is still controversial, why do you have a problem? The current definition of planets is just a majority of people at the meeting, and it is not clear that one day there will be ten more planets in the solar system, and the number of planets will still not change.

Cosmic data: Some of the cosmic objects observed by humans are roughly composed of ordinary matter (the matter that makes up stars, planets, gases, and dust) or "baryons", dark matter, and dark energy. Baryonic matter makes up the "spider webs" of intergalaxies.

Saturn is the sixth planet in the solar system in order of distance from near to far, it has seven beautiful rings, and his rings are bright and dazzling, so some people call Saturn "the beauty of the stars".

Jupiter is composed of 90% hydrogen and 10% helium (the ratio of atomic numbers, 75-25% to mass) and trace amounts of methane, water, ammonia and "stones". This is very similar to the composition of the primordial solar system nebulae that formed the entire solar system. Saturn has a similar composition, but in the composition of Uranus and Neptune, the amount of hydrogen and helium is less.

Visible planets. Planets are celestial bodies that do not emit light on their own and orbit stars. Generally speaking, a planet needs to have a certain mass, and the mass of the planet must be large enough that its shape is about spherical, and the mass that is not enough is called an asteroid. The name "planets" comes from the fact that their positions are not fixed in the sky, as if they were walking.

The 5 planets visible to the naked eye in the solar system are: Mercury, Venus, Mars, Jupiter, and Saturn. After thousands of years of exploration, it was not until Copernicus established the heliocentric theory in the 16th century that it was generally recognized

The Earth is one of the planets that orbit the Sun, and the eight planets, including the Earth, make up a planetary system that revolves around the Sun – the main members of the Solar System.

Every star we see in the universe is a star, not a planet. Stars are luminous.

The body density is relatively large, while the planets orbit the stars, which are relatively small and cannot emit light and heat.

The sun we see is a star, and our earth revolves around the sun, which is a planet, the moon.

Orbiting around us, call it a satellite. At night, when we look up, the stars we see are stars, because they can emit light, so its light hits the earth from a great distance, so we can see it.

We are more familiar with the North Star.

It is an important star for navigation in the wild at night, ranking 47th in the brightness of the starry sky, this is a relatively large star, the volume is more than 50,000 times that of our sun, it is incredible to think about. How far away is it from our earth? A light-year away from us, 1 light-year is equal to about 946.1 billion kilometers, and then multiply it to get how many kilometers away the North Star is from us.

The stars we can see are relatively large, if they are not large, it is difficult for its light to reach the earth, after all, the distance is very far, and the size of the planet is nothing compared to the star. If one day we can travel interstellar and want to see the North Star, how long will it take? Assuming our spacecraft reaches the speed of light, it will take about 445 years to get to North Star.

There are many stars in the starry sky that need to be explored by scientists, because the universe is very large, what we understand is only the tip of the iceberg in the universe, and what we see is only a small part of the universe, and we still have a long way to go.

Is every star a planet in the universe? It's not planets, it's stars, stars can emit light, so where can we see the light it emits, planets don't shine, we can't see it with the naked eye, so some people ask: why does the moon shine?

Because the moon is a satellite, we can see the moon's light because it receives the sun's light, and we can see it more clearly.

Every star is a planet, and although the stars we see are very small, they are actually very large.

Each star is a planet and a very independent star.

I feel like every star is a planet because there's a scientific basis for that.

The largest known galaxy is named IC-1011 and has a diameter of 6 million light-years, and the Andromeda Galaxy is simply not enough to see at 200,000 light-years in diameter.

**The Milky Way is on the right, the subsequent galaxies are all larger than the Milky Way, and the last one is a panorama of the universe.

The largest galaxy discovered so far is the Andromeda Galaxy.

With a diameter of 50 kiloparsecs (160,000 light-years), twice the diameter of the Milky Way, the Andromeda Galaxy is the largest galaxy in the local group, about 2.2 million light-years away. The Andromeda Galaxy and the Milky Way have many similarities, and a comparative study of the two can provide important clues to understand the movement, structure, and evolution of the Milky Way.

The Andromeda Galaxy is the closest large galaxy to our Milky Way. The Milky Way is thought to look very similar to the Andromeda Galaxy, and together they dominate the local group of galaxies. The light that pervades the Andromeda Galaxy is the result of hundreds of billions of stellar members.

The bright stars surrounding the image of the Andromeda Galaxy are actually stars in our Milky Way, much closer than the objects in the background. The Great Andromeda Galaxy is also known as M31 because it is the 31st diffuse object in the famous Messier Cluster Nebula Catalog. M31 is quite far away, and it would take 2 million years for the light emitted from it to reach Earth.

The stars in the nebula can be divided into about 20 colonies, which means that they may come from smaller galaxies that are "devoured" by the Andromeda Galaxy

The largest known galaxy in the universe is a giant galaxy larger than 6 million light-years in diameter, the IC-1011 galaxy. It is 60 times larger than our own Milky Way (the diameter of the Milky Way is 100,000 light-years), making it the largest galaxy ever discovered. IC 1011 is about 100 million years old.

IC-1011 galaxy: Scientists believe it may have a supermassive black hole center. It has a dull yellow outer layer, the middle layer becomes light yellow, and the white central layer.

In the White Festival, there are many known types of radiation hazards emitted by IC 1011, suggesting that it may not be able to support life. The shape of IC 1011 is very thin, not the shape of a normal elliptical galaxy. That's why it's classified as a compact elliptical galaxy, but it's generally referred to simply as an elliptical galaxy.

What is the largest galaxy in the known universe? Star Awareness Project