Anyone interested in astronomy knows that in the vast universe, most star systems have been shown to be composed of at least two or more stars, but the solar system we live in is very special, and the solar system has only one star, that is, the sun.
Scientists have actually been looking for the existence of a second sun in the solar system.
In the mid-1980s, the American physicist Mueller proposed his own conjecture about the solar system: the sun might have a companion star.
This companion may be a red dwarf star very far from the Sun, orbiting the Sun in an elliptical orbit, entering the boundary of the Solar System (Oort Cloud) every nearly 30 million years or so, and stirring up many comets into the inner Solar System, causing periodic mass extinctions of life on Earth.
Although the companion has not yet been discovered by humans, scientists have given it a name: Nemesis, but despite this, the Oort cloud at the boundary of the solar system provides many clues to the search for solar companions.
The Ault Cloud is made up of icy microplanets, which, under the influence of the Sun's gravity, form spherical clouds that surround the solar system, also known as the boundary of the solar system. The distance from the Oort cloud to the Sun is about 110,000 times the distance from the Earth to the Sun.
Scientists have found through research that if the solar system has only existed one star so far, then the theoretical density of matter that makes up the Oort cloud should be less than the actual density measured today, and this deviation has to make people believe that there have actually been two stars in the solar system, that is, two suns.
Scientists believe that if clues can be found that the Oort cloud is attracted to the two suns of the solar system, then the theory of the formation of the solar system will be completely overturned, and the question of the life cycle extinction of the Earth will be solved. Some scientists speculate that comets from the Oort cloud brought the basis of life to Earth: water.
But the arrival of comets also led to events such as the mass extinction of dinosaurs, so why did Nemesis disappear out of thin air? Where did it go again?
Scientists have been trying to find it, and it is likely to be carried away by a star that has skimmed across the solar system, along with most of the material from the Oort Cloud, a companion star that has traveled to a region of the Milky Way that humans have never observed.
Sixteen years ago, the International Astronomical Union organized the official expulsion of Pluto from the list of planets, and since then Pluto has been identified as a dwarf planet, and the concept of the eight planets has finally been formed. But astronomers are still looking for Planet Nine in the solar system.
Through theoretical analysis and computer simulations, Planet Nine does exist, and the results of each study are quite close, unlike other gaseous planets, Planet Nine is very massive, four times the volume of The Earth, more than ten times the mass of the Earth, it orbits the Sun, and each rotation takes about 20,000 years.
Scientists speculate that Planet Nine may have been an exoplanet captured by the sun when Earth was born, and when the galaxy contains multiple stars, the positions between the stars are not relatively static.
Several stars also often pass by each other, and when the "narrow road meets", the sun may have dragged multiple planets from other star systems, gradually breaking away from the star cluster and gradually forming our solar system, which coincides with Mueller's companion star theory, and the sun has captured Planet Nine with the help of companion stars.
In recent years of astronomical observations, scientists have observed stars that orbit beyond Neptune's orbit and are at the same distance from the Sun in distant exoplanets, known as trans-Neptune objects.
These strange objects are very far away, and scientists have analyzed that it is not Neptune that affects the special orbit of trans-Neptune objects, but Planet Nine, which people have been looking for. Planet Nine is far beyond the orbit of Pluto, and its distance to the Sun may be nearly a thousand times that of Earth to the Sun.
Some scientists believe that Planet 9 is likely just a primordial black hole, but there is no direct evidence to confirm the existence of primitive black holes, and the scientists hypothesize based on gravitational anomalies found in optical gravitational lensing experiments.
In 2022, the Willa Rubin Observatory will be officially launched, one of the main tasks is to search for extrasolar system objects beyond Pluto, and perhaps one day, we can really find a second Sun and Planet Nine.
The picture comes from the Network, and the intrusion must be deleted.