Source: Science and Technology Daily
A joint research team at the University of Durham and the University of Helsinki in Finland recently wrote in the International Astronomical Journal, The Royal Astronomical Society Monthly, that the Large Magellanic Cloud (LMC) collided with the Milky Way. Just as the pebbles are thrown into the calm lake, they cause water splashes and the earth can be thrown out of the Milky Way during that impact.
Just as the moon is the moon and the Milky Way is surrounded by a group of satellite galaxies, the Great Magellanic Cloud is one of the brightest, about 163,000 light-years away from the Milky Way. Previously, astronomers believed it would run billions of years around the Milky Way and could even escape the Milky Way.
Researchers have discovered that the mass of the Great Magellanic Cloud is far beyond expectations, and its orbital energy will be rapidly attenuated by dynamic friction, and are likely to collide and merge with the Milky Way after 2 billion years. Simulation studies have shown that the impact will bring devastating disasters to the Milky Way. The sleeping black hole in the Milky Way will activate, the volume will expand rapidly by 10 times and the mass increase may be up to 8 times. Active black holes will release a large amount of high energy radiation. If the gamma rays generated by the jets hit Earth, they will destroy the ozone layer and cause the extinction of a large number of organisms.
However, the researchers also found that the solar system will probably be withdrawn from the Milky Way during impact, into the wider space and the Earth will be spared. Astronomers have predicted that the Andromeda galaxy will reach the Milky Way in 8 billion years, which will allow the possible collision time between the Milky Way and other galaxies to advance in 6 billion years.
Marius Cowton, the first author of the thesis and a postdoctoral fellow at the Institute of Computational Cosmology at Durham University, said that although 2 billion years is a very long time compared to human life, it is very short on the scale of cosmic time. Professor Carlos Franck, director of the Institute of Cosmology, pointed out that the universe is constantly evolving through collisions of similar galaxies, and that our children and grandchildren will see spectacular spectacles of cosmic fireworks that will emit extremely bright jets. Object