Scientists are confident that the main dangers awaiting the Earth and humanity will come from outer space. These threats are collected in a video that appeared on the Internet some time ago.
1. Explosion of the Sun
In the Universe known to us, sooner or later everything comes to its own time, including the stars. According to the calculations of researchers, the Sun will die in 5 billion years. The celestial body will turn into a red giant, increasing hundreds of times, and will destroy all living things on Earth, if, of course, it will exist at that time.
2. Descent of the Earth from orbit
As the Earth moves away from the Sun, if it leaves its orbit, the average temperature on the planet will decrease year after year. As a result, a new ice age will begin.
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3. Asteroids
History shows that meteorites play an important role in the fate of the Earth. A common scientific hypothesis is that it was they who caused the extinction of the dinosaurs. It cannot be ruled out that in the future people will repeat the fate of ancient animals.
4. Wandering black holes
A black hole is a region of space-time, the gravitational attraction of which is so great that even light cannot leave it. Scientists have counted about 10 million of these objects in the Milky Way. Like stars, black holes rotate slowly and can migrate. If one of the black holes ends up in Earth's orbit, it will be pulled into oblivion along with people.
5. Gamma-ray bursts
The constellation Sagittarius contains a potential threat that can send life on earth back to the Mesozoic era. We are talking about a dying star that should go supernova in the next few hundred thousand years. At the last moment of its life, the celestial body will shoot out the most powerful gamma rays. If they reach Earth, the planet will experience a massive extinction.
6. Collision of the Earth with another planet
About four and a half billion years ago, one small planet crashed into a larger planet. As a result, the Earth and the Moon were formed. A new collision would have caused the Earth to melt.
7. Aliens
British theoretical physicist Stephen Hawking, who died in March 2018, highly appreciated the likelihood of life on exoplanets. At the same time, the scientist believed that a meeting with a more developed civilization did not bode well for people. They will suffer the same fate as the Native Americans ruthlessly conquered by the European colonialists, Hawking warned.
8. Comets
In 1994, Jupiter collided with a fragment of comet Shoemaker - Levy 9. Following this, the temperature of the largest planet in the solar system rose sharply and a gas cloud was formed on it. It is scary to imagine what would happen to the Earth if it were in the place of Jupiter.