Regarding some scientific knowledge, everyone thinks that the universe really has a second planet, a

The universe is so big, and it is not difficult to find a planet similar to the earth, although it is a small probability event, it is not difficult in the face of a huge base. In addition, according to the Green Island formula, we have theoretically and to some extent demonstrated the possibility of the existence of life in the universe (especially the Milky Way).

Here's the Green Island formula (briefly):

The Green Island formula involves many fields including astronomy, physics, chemistry, biology and even environmental science, sociology, history, etc., and is a formula that contains many factors, including the probability of the existence of medium-sized stars like the sun, the probability of the existence of stars with star systems and other conventional items, the probability of planets evolving life, and even the probability of planets being destroyed by devastating disasters such as nuclear war, and the survival period of stars, etc., which is more complicated anyway, But the final conclusion: the number of planets with life in the Milky Way is greater than one! But since many factors are only estimates (e.g., the probability of being destroyed in a nuclear war), this formula is not entirely accurate, and our theory may only apply to us.

It's a matter of probability, and the probability is very small, but it doesn't mean that there isn't. The universe is so big, there are so many galaxies, who can guarantee this probability?

Well, if it's exactly the same, there might only be parallel spaces, or, on the other hand, mirror worlds

This, this kind of planet must have it.

How many planets there are in the universe, this data can never be estimated, and celestial bodies are the existence forms of matter in the entire universe. To this day, the number of satellites in the solar system continues to break records. On October 7, 2019, the International Astronomical Union's Minor Planet Center announced that astronomers had discovered 20 new moons of Saturn, bringing the number of Saturn's moons to a staggering 82, three more than Jupiter's 79, making it the highest moon in the solar system.

But if we exclude other celestial bodies and only count stars, take the Milky Way galaxy as we know it, for example, when we use the naked eye to wool the starry sky, we can see about a few thousand stars. But these so-called stars are visible to the naked eye and occupy only a very small area of the Milky Way. Based on current observations, it is estimated that our galaxy has about 1,000 to 400 billion stars.

And if this data is more accurate, it is about 200 billion grams. And in the entire observable universe, the Milky Way is neither big nor small. For example, the Andromeda Galaxy, which is closer to us, has about a trillion stars.

According to current observational data, there are about 100 billion galaxies of different sizes in the observable universe, which means that we don't know how many galaxies there are in the observable universe, but the mountain chain wants to know how many stars there are. This difficulty is more difficult than getting acquainted with how much sand there is on Earth. Here we present a concept of the observable universe.

We can see that matter is more than light, because the universe expands faster than the speed of light. In other words, the limit of what we can see at present is the range of no more than 46.5 billion light-years with a radius of no more than 46.5 billion light-years at the center of the Earth. This is the universe we can observe, also known as the Hubble Miracle.

Therefore, due to the acceleration rate of redshift, our field of vision is always smaller than the world. And how vast and vast is there outside this world, we will never know. And the question we began to ask, how many celestial bodies there are in the universe, may be an eternal mystery.

The length of human civilization is incalculable.

Planets larger than galaxies appear? If there were, it would be terrible.

From a scientific point of view, planets have limits. If they are too big, they become stars. And stars also have a theoretical limit. With more than 150 times the mass of the Sun, it will be difficult to find more material and cram it into stars.

To get a star like R136A1 (the brightest star in the R136A cluster) is equivalent to 260 solar masses. So far, the theoretical upper limit is around 300, but this could be pushed even higher.

But let's assume that there is a star with 500 times the mass of the Sun and does not need so much complex matter. In its hundreds of thousands of years of life, it would have lost about 200-300 solar masses – a star of this size simply does not want to exist.

If a planet becomes too large (say, it is 20 times more massive than Jupiter), then its gravitational pull will be so strong that it will collapse, and nuclear fusion will begin – it will become a small star.

So no planet can be bigger than a star. The star avoids collapsing under its own gravity because the "photon pressure" of the light it produces pushes outward, counteracting gravity.

If it's a big, limit-large star, this causes the star to quickly deplete its energy reserves – and then, when there's no more energy left to produce light, gravity takes over and it collapses.

Such a huge star would collapse into a black hole.

And if you want to be bigger than a galaxy, there is obviously no such thing.

There are at least two trillion galaxies in the universe, and the universe is huge because of the hunger and this is only detectable at the moment. Galaxies are generally composed of a large number of stars and nebulae, which can be divided into spiral galaxies, barred spiral galaxies, elliptical galaxies and irregular galaxies according to their shapes, but most of their Qishi galaxies are composed of nebulae and star clusters.

There are at least two trillion galaxies in the universeThere are at least two trillion galaxies in the universe, and this is just the tip of the iceberg that people have observed in the universe at the moment, and there are actually many more galaxies. Galaxies, also known as extragalactic galaxies, are generally made up of a large number of stars and nebulae, but in fact each galaxy is very far apart.

Generally, according to the shape and structure of galaxies, galaxies can be divided into spiral galaxies, barred spiral galaxies, elliptical galaxies and irregular galaxies, and different galaxies have many different shapes. At present, the most common classification of extragalactic galaxies was actually proposed in 1929 and has made great contributions to the exploration of galaxies.

Galaxies typically contain stars, gas, cosmic dust, and dark matter, all of which are bound together by gravity to form nebulae. Galaxies are generally very large, but with the exception of individual stars and thin interstellar matter, most of the remaining galaxies are composed of nebulae and star clusters.

At present, Canis Major VY is the most known volume of the human class BAI

One of the big stars. Suppose you sit on a passenger plane with a speed of 900 kilometers per hour and circle around Canis Major.

Answer, it takes 900 years to fly. It can easily fit about 3 billion suns.

University of Minnesota professor Robert MHU Canis Major VY with Galaxy Orbit Mphreys)** The diameter of the Canis Major VY CMA is about 1800-2100 times the radius of the Sun. If you place Canis Major in the center of the solar system, its diameter exceeds the orbit of Saturn (about 10 astronomical units).

It takes hours for light to circumnavigate it, whereas it takes seconds for light to circumnavigate the sun. But as the observations progressed, the diameter of the star was remeasured, and the current estimated size is 1420 solar diameters.

According to the three-dimensional formula of the sphere, its volume is a billion-fold volume of the Sun. If the Earth is a sphere with a diameter of 1 cm, and the Sun is a sphere with a diameter of 109 cm, the maximum diameter of Canis Major vy** is about kilometers according to the above ratio.

As can be seen from the above, the largest known planet is unimaginably large! And the sun, which is 1.3 million times larger than the earth, is not worth mentioning in front of it, let alone the tiny earth! How many times bigger is Canis Major VY than Earth? Imagine for yourself!

UY is the largest star in the known universe today. It is 5 billion times larger than the Sun.

The mass is only 32 times that of the sun. A: The most massive star known is R136A1, which is about 265 times the mass of the Sun. I believe that there are other bigger stars in the universe, and as technology becomes more advanced, we will discover more interesting objects!

Astronomers have noticed that while there are many planets that are similar in size to Earth or slightly larger than Earth, there are steep closing points in the size of planets before they reach the size of Neptune. Edwin Kate, a planetary scientist at the University of Chicago, said. "It's the edge of the data cliff, it's very dramatic.

We wonder why planets more than three times the size of the Earth tend to stop growing. In a new study published in the journal Astrophysics, Kate and colleagues at the University of Washington, Stanford and Pennsylvania State University offer an innovative explanation for the decline.

Once a planet reaches three times the size of Earth, the magma sea on the planet's surface can easily absorb the atmosphere. The answer may depend on the hardly studied aspects of this exoplanet, with most planets slightly smaller than the size of the drop having lava seas on their surfaces, such as the lava seas that cover the Earth. But instead of hardening like the Earth, they rely on an atmosphere rich in thick hydrogen to maintain their temperatures.

So far, almost all models ignore this magma and treat it with chemical inertness, but the liquid rock is almost as soft and lively as water.

Most of the volume of these planets is in the atmosphere, so the shrinking of the atmosphere will cause the planets to shrink. Researchers call it "work is also a crisis," a term that is a gas that dissolves in mixtures more easily than pressure-based expectations. This theory is very consistent with existing observations, and astronomers could find some markers in the future.

For example, if the theory is correct, if the surface of the planet with a sufficiently cold magma ocean has been determined, it should exhibit a different profile, because this prevents the ocean from absorbing so much hydrogen. This observation technique is the application of microgravity lensing on wandering planets, and since the observation of exoplanets, microgravity lensing technology has begun to become more mature, and its application is still Einstein's general theory of relativity.

Massive celestial bodies distort the structure of space-time, and we can calculate the mass by detecting the distortion of space-time. Because planets can distort space-time as long as they have sufficient mass, the intervention of the WFIRST wide-field infrared measurement telescope is required. Infrared sounding devices do not have direct observation of the planet.

Because there is rarely enough heat released on the planet. Even ultra-sensitive detectors are useless. But the WFIRST Wide-field Infrared Measurement Telescope can detect objects in front of the star, and when a wandering planet passes through the star's plate, the star's light is distorted, and very small changes can detect the infrared detector.

The distribution of massive stars in the universe is so rare that no larger stars have been found within the detectable range of humans, and they are far from the size of the entire galaxy. Human detection may not exist, but the probability is extremely low.

Because the existence of the planet is related to many factors, such as heat, mass, and asteroid impact from time to time, it is very difficult to stay.