With the progress of human science and technology, human beings have more and more understanding of the solar system, and now human beings have been able to go out of the earth to explore the universe, which shows that the speed of human science and technology development is still very fast, according to the research of scientists we can know that the earth is a planet in the solar system, there are eight planets in the solar system, they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, there is a Pluto outside Neptune, once Pluto also belonged to a planet, But then scientists thought that Pluto's size and mass were too small, so they kicked Pluto out of the ranks of planets, and now there are only eight planets left in the solar system.
Among the eight planets, only the planet Earth was born with life, and human beings are the most intelligent life on the earth, human beings have begun to explore the mysteries of the universe since their birth, after so many years of exploration, human beings finally have a general understanding of the universe, once scientists believed that flying out of Pluto is even if it is flying out of the solar system, and later after the research of scientists, it was found that there are Kuiper Belt and Oort Nebula outside Pluto, and only flying out of the Oort Nebula is considered to fly out of the solar system. According to the calculations of scientists, we can know that the diameter of the solar system is about 4 light years, although 4 light years seem very close, but it is very far away for humans.
Light-year is the distance of light flying in the universe for a year, the speed of light is about 300,000 kilometers per second, we can calculate how far the distance of 4 light-years is, the current human flight speed is unable to fly out of the solar system, so human exploration of the solar system is basically rely on astronomical telescopes to observe, in the scientists observe the edge of the solar system when found that there is an unknown gravitational source at the edge of the solar system, this mysterious gravitational source is called Planet X, many scientists believe, There may also be a ninth planet hidden at the edge of the solar system, and scientists have calculated that this planet has a mass of about 4500 times that of Pluto, which is about the same size as Uranus.
Seeing this, many people may have a question, that is, how do scientists judge planet ninth? In fact, when scientists observe the Kuiper Belt, they found that the orbit of 6 celestial bodies in the Kuiper Belt is very abnormal, although these 6 celestial bodies are constantly working, but they have different inclinations, under natural conditions, the probability of this situation is about one in 14,000, is this just a coincidence? Scientists believe that this is not a coincidence, but because there is a huge gravitational source at the edge of the solar system, which affects the objects in the Kuiper Belt, but scientists have not yet found the planet at the edge of the solar system.
In addition to this conjecture, scientists also hypothesized that this X celestial body may be a black hole, I believe that many people are not unfamiliar with black holes, black holes were calculated by Einstein more than 100 years ago, but because human technology was not developed enough at that time, so many people did not believe in the existence of black holes, and later with the progress of human science and technology, in 2019, scientists took the first picture of black holes, which also proved that Einstein's conclusion was right, according to human understanding of black holes, Black hole is the largest gravitational object in the universe, the characteristics of black hole is to constantly swallow matter, as long as it is into the black hole horizon of matter, will be swallowed by the black hole, even light is no exception.
However, if there is a small black hole hidden at the edge of the solar system, then the volume of this black hole is only as large as an apple, but its mass is 10 times the mass of the Earth, in order to find this black hole, scientists have also thought of a lot of ways, scientists think that the location of this black hole can be located through flares, the so-called flares refer to the Kuiper Belt and the Alt Nebula in the asteroids in the black hole, when close to the black hole, the radiation released after being swallowed by the black hole, as long as we can find these radiations, Then we can determine the location of the black hole, but scientists after many observations, the final location of the black hole was not found, is it that the small black hole disappeared?
According to hawking radiation and black hole evaporation theory, the smaller the mass of the black hole, the faster its Hawking radiation evaporates, even if its mass is very large, but at the edge of the solar system, the black hole can not swallow other matter in time, and eventually it will die because of the complete evaporation of Hawking radiation, the number of black holes in the universe is very large, there is a supermassive black hole in the center of our galaxy, the mass of this black hole is about 4.3 million times the mass of the sun, the gravitational pull of this black hole is very strong, can control the rotation of the entire galaxy, Seeing this, many friends may have a question, that is, if there is really a small black hole at the edge of the solar system, then why is the earth not affected?
Scientists believe that the gravitational horizon of the black hole is a range, the mass of the black hole its gravitational range is also small, because the black hole can not swallow matter for a long time, so its gravitational range will become smaller and smaller, and eventually disappear completely, although now scientists have detected the gravitational source at the edge of the solar system, but scientists can not judge what this gravitational source is what the celestial body is, if this gravitational source is the ninth planet, then scientists believe that this planet is not from the solar system, but a wandering planet, When passing through the edge of the solar system, it is captured by the gravitational pull of the sun, so it will become the ninth planet of the solar system, and scientists have already thought of the name of the ninth planet, called Nibiru Star.
However, due to the limited observation technology of human beings now, and if this mysterious celestial body is hidden in the Oort Nebula, then it is very difficult for humans to observe it, in the Oort Nebula, there are a large number of asteroids and comets, the diameter of the Oort Nebula has reached 2 light years, in so many asteroids, human observation line of sight will be blocked, so it is difficult for humans to find it, Xiaobian believes that whether this celestial body is a black hole or the ninth planet, now scientists can determine that, There must be a mysterious object at the edge of the solar system, but now we don't know what this object is? In the future, with the development of human technology, perhaps human beings can find this mysterious celestial body.
For human beings, the best way is to personally fly to the edge of the solar system to explore, because only in this way can we really determine what this mysterious celestial body is, Xiaobian hopes that human beings can find this celestial body as soon as possible.