What happened when the comet hit the earth? What year was that and what were the consequences?

The event of a comet hitting the earth once caused social panic, and the collision between planets will cause many problems. Through long-term observation in the later period, it is proved that the crisis exists. Then, let's use constellation knowledge to reveal what happened when a comet hit the earth. What year was that? What are the consequences? Let's have a look!

How did the comet hit the earth? Comets hit the earth six times every 240 million years (a galactic celestial year). When they pass through the earth, they may hit the earth and cause catastrophic damage to the earth. Most comets will stay out of Neptune's orbit and pose no threat to the earth. But there are exceptions to everything. Some comets, influenced by the gravity of large celestial bodies nearby, will change their orbits and may hit the earth. Some stars, such as Neptune, or other stars near the solar system or brown dwarfs, Pluto or Sedna, may enter the inner solar system once they change their orbits and become comets visible to the naked eye, with little chance of hitting the earth.

When is the modern recorded comet hitting the earth? It happened twice.

1, the first comet hit the earth (1908) 1908 The Tunguska explosion in Siberia, Russia destroyed 2000 square kilometers of forest, which is thought to be caused by the shock wave generated by the explosion of a meteorite with a diameter of 100 meters at a place 6.4 kilometers from the ground. The Tunguska Big Bang occurred at 19, at 7: 00 am (0: 00 UTC) on June 30, 2008, over the Ewenki Autonomous Region of Siberia, Russia. The explosion occurred near the Tunguska River, 800 kilometers northwest of Lake Baikal, at 60.55 degrees north latitude and 1.0 1.57 degrees east longitude. At that time, it was estimated that the explosive power was equivalent to 20 million tons of TNT, and 80 million trees of 2 1.50 square kilometers were burned.

2. The second comet hit the earth (1976), which happened in meteorite shower, Jilin, Northeast China. It is proved that an asteroid formed in the asteroid belt 4.6 billion years ago collided with other stars in operation 8 million years ago, causing a big explosion, leaving the asteroid belt and falling to the earth's surface.

What will happen if a comet hits the earth? Except for a few areas near the impact point, the impact itself will not cause fatal harm to human beings on the earth, but it will throw a lot of dust into the earth's atmosphere, leading to the chronic death of billions of human beings. A lot of dust will bring a "permanent winter", the sun will be covered, crops will wither and die, thus causing widespread famine. Dr DaveRothery, a volcanologist from the Open University of England, made a similar prediction, but he believed that the deadly dust entering the atmosphere came from the eruption of super volcanoes. A large amount of dust produced by the eruption of super volcano will remain in the atmosphere, preventing the sun from causing famine. "There are a lot of volcanic ash and sulfur dioxide in the atmosphere, and photosynthesis cannot be carried out at all." In 18 16, a similar but relatively less destructive event occurred. The volcanic eruption in Indonesia has produced a lot of dust into the atmosphere, so that this year is called "a year without summer".

The release of methane deposits from the seabed leads to global warming. Dr. Lovel claimed that the release of a large amount of methane deposits from the seabed would accelerate man-made climate change and lead to "imminent catastrophic climate change". In addition to scientists, many people have put forward various doomsday theories, some of which are unlikely to happen, and some are groundless. One of the most famous is that the interplanetary planet Nibino will hit the earth. Nibino is located outside the solar system and farther away than Pluto. Scientists explained that this theory is absurd, not only because no one has detected the existence of this planet outside the solar system, but also because if such a big planet really hit the earth, we should have observed it by now.

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