Scientists have named an unexpected threat from outer space
For the evacuation will be too late.
Upstairs
The probability of collision of Earth with an asteroid is not always possible to calculate in advance, were forced to admit the researchers.
When such a collision happens, it will be too late for the evacuation of a region, says a team of scientists from the Complutense University of Madrid.
In most cases, scientists know the trajectory of motion of these comparatively small celestial bodies that orbit the Sun.
But the change trajectory may occur as a result of an asteroid collision with another celestial body. Such in the solar system tens of thousands, scientists say.
Unexpected shock can send a asteroid towards the Earth.
The collision of the Earth with the body more than 50 meters in diameter could lead to numerous victims. If the size of the cosmic body will be more than 3 km, such a collision will lead to the destruction of civilization.
The scholars give an example with the asteroid in 2018 LA with a diameter of about 2-3 meters collided with the Earth 2 June 2018 close to the border of Botswana and South Africa. The asteroid was discovered only 8 hours before the collision. The probability of collision was estimated at 85%, the possible area of falling stretched from Australia to Madagascar. It is possible that 2018 LA was formed during a massive collision of two or more rocks in the asteroid belt.
Scientists estimate that near the Earth rotates about 15 thousand asteroids with a minimum width of 25 meters and 8 thousand with a minimum width of 140 meters.