"Planet 9" left its mark on Earth before disappearing?

(NLDO) - A mysterious planet may have approached the early Sun at a distance slightly further than Uranus and rearranged everything in the star system.

According to a new study led by Dr. Garett Brown from the University of Toronto (Canada), in addition to the eight current planets, there was once another planet in the Solar System that was 2-50 times the size of Jupiter.

But that giant did not come from the Sun's protoplanetary disk, but was an invader.

An invading planet may have approached the Sun at a distance just a little further than Uranus - Illustration AI: Thu Anh

According to Science Alert, research by Dr. Brown and his colleagues has investigated how a planet visiting the Solar System in the past could shape the orbits of objects today, including Earth.

Calculations show that this possibility is as high as 1 in 100, a significant proportion compared to the impact it could have.

Using simulations, they calculated the enormous size of this visitor, as well as showing that it approached the Sun at a very close distance of a maximum of 20 astronomical units (AU), which is beyond the orbit of Uranus.

One AU is equal to the distance from the Sun to Earth, and Uranus is about 19 AU from the Sun.

For distances between objects not in the same star system, passing by each other at only 20 AU is too close.

The idea behind this research comes from an effort to study the orbital evolution of planets in the Solar System, which is still full of gaps.

The evolution of planetary orbits is a complex process, with each planet today no longer in its original orbit.

Of these, Jupiter and its movements are thought to have had the greatest impact in shaping the orbits of the planets today. However, this alone cannot explain all the complexities and differences in the orbits of the other seven planets.

The aforementioned giant invading planet provided another piece of the puzzle, filling in some gaps.

In addition, the above results also help us understand more about strange visitors that can enter the heliosphere.

Thanks to modern observational techniques, humans have captured several strange visitors from the interstellar medium in recent years, although they have only been asteroids.

The most famous of these is Oumuamua, a cigar-shaped asteroid with an odd orbit, suspected by some scientists from Harvard University (USA) to be related to alien technology.

Source: https://nld.com.vn/hanh-tinh-thu-9-ghi-dau-an-len-trai-dat-truoc-khi-mat-tich-196241213103146477.htm