Interstellar visitor: nurturing the earth and life?

  Everyone knows that our “mother” Earth is not entirely a native of the solar system. Her “seed” comes from outside the solar system and is a child of someone else’s surrogate in the solar system.
   This is the conclusion of a recent study. The study suggests that the Milky Way should be full of interstellar rocks that move freely like Oumomo. It is especially worth mentioning that they may have played a very important role in the formation of planets.
  ”Star Tramp” is a planter
   form on the planet, the traditional view is that they form a disc called “the original stellar disk” around the star of gas and dust. But some observations indicate that the speed of planet formation seems to be much faster than theoretically predicted.
   Interstellar objects like Oumomo may be the key to solving this problem. It is estimated that in our Milky Way, there should be about 29 trillion interstellar celestial bodies similar to Aomomo per cubic light-year. They became “interstellar wanderers” after being thrown out by the “solar system” where they were originally located. They are relatively small and move fast, so they are not easy to detect. This is why we have only seen one so far.
   Recently, two European scientists proposed that if these interstellar rocks are captured by another protostellar disk that is forming stars and planets, they may play a key role in the formation of planets. Because these “interstellar wanderers” are larger and have strong gravitational force, they can use their own gravitational force to attract dust, gas, and rocks around them, and eventually turn themselves into a planet. They seem to provide a seed for the growth of planets, thereby greatly accelerating the formation of planets.
   Extensive cultivation of extraterrestrial
   Although these “Star tramp” because moving too fast, not easy to be captured, and most likely to be captured and fell into the stars, but even so, the two scientists calculated that around each star at least another Approximately 10 million interstellar objects with a size equal to or larger than Omomo (approximately 100 meters in diameter) will remain, of which thousands may be more than 1 km in diameter, and a few may even be comparable to Pluto. It can be seen that the “seed” is very rich.
   This mechanism will also self-feedback: star systems with more planets will produce more “interstellar wanderers”; and the more “interstellar wanderers” they will produce more planets in other star systems…
   if so If so, it can also explain another mystery: Why do old stars have fewer planets than new stars? Because in the early days of the universe, there were relatively few interstellar celestial bodies, and planets mainly relied on the traditional method, that is, the slow accumulation of dust particles. Later, as the number of “interstellar wanderers” increased, “usage doctrine” became the mainstream. Throughout the Milky Way, the formation of planets should be accelerating.
   You see, although Aumomo came from outside the solar system, thousands of miles away from us, and came and went, some of its earlier brothers may be at our feet.
   Carrying the life Travel
   Austrian unfamiliar street findings prove that asteroids can indeed travel in the interstellar medium, and extraterrestrial life can carry these natural “spacecraft”, migration from one planet to another planet. Life evolved accidentally from one place and spread to the entire galaxy in this way.
   Of course, to complete this mission, it’s not enough for this natural “spacecraft” to travel between the stars. In order to transfer life, it must eventually be captured by the gravitational force of another “solar” star, and finally be in good shape with a star. The planet in the habitation zone collided in order to unload its “passengers”-because it itself is not suitable for long-term settlement of life.
   In order to ensure the safety of life, there are also requirements for the size of these asteroids. They cannot be too small, because too small, the environment of the asteroid is too easily affected by the space environment, which is not conducive to the survival of “passengers” during the ride. For example, if an asteroid is large and has a cave in it, life can hide in this cave and resist the cold and deadly radiation of space.
   Scientists have estimated that the radius of the asteroid that is conducive to carrying life cannot be less than 200 kilometers-this size is about half the size of Enceladus.
   Where do they come from?
   In this way, in order to complete the mission of spreading life between galaxies, asteroids carrying life must meet two requirements: first, it is easy to be captured by another star system; second, it must be slightly larger. Scientists have calculated that there are more than 100 million asteroids in our Milky Way that meet these two requirements.
   At first glance, this amount may seem considerable, but considering another fact, it is not so optimistic.
   First of all, we have to ask, where did the life on these asteroids come from? Obviously, the environment of asteroids is very detrimental to the evolution of life, so few asteroids can evolve life by themselves. It is even more likely that life has evolved on a large planet, and when a planet collides with it, it is “cut” to the next piece, and this piece of life that lives on it flies into space and becomes a ship. Interstellar “spacecraft” (There are many rocks on the earth that were “cut” from Mars and landed on our planet. This situation even led to speculation that the seeds of life on earth originally came from Mars.
   However, these asteroids “cut” from the big planets, after all, account for a very small number of asteroids. Therefore, there are not so many asteroids carrying life on interstellar journeys than scientists have calculated.
   As for whether the seeds of life can spread within the galaxy, how did the seeds of life on earth come from? This question is probably left to future generations. If life is found in other parts of the Milky Way in the future, and these life are very different from life on earth, it means that life in each place has evolved independently; but if alien life is extremely similar to life on earth, it may mean that life on earth Things have indeed traveled between the stars.