The head of NASA warns that it is time to take the threat of a devastating asteroid grounding sur & # 39; ozna.
Jim Bridenstin spoke like Space Agency beginning of its exercise of planetary protection conference based around a hypothetical scenario of a collision with an asteroid.
NASA Administrator expressed concern that such warnings have historically led the fun and said that an asteroid collision has been more common than people believe.
The planetary protection exercises this week, simulating the global response to the devastating meteorite Earth, NASA's first step will be to accurately measure the speed of the & # 39; and an object trajectory.
After that, a decision must be made: an attempt to avoid a collision by deflecting an asteroid or to evacuate the area, he may bump into.
Planetary protection and astronomical experts warn against humanity by destroying large asteroids nuclear weapons exit because of fears that they will simply be broken into smaller pieces dangerous.
Scientific study, released in March pours cold water on film theory that people can just blow up an asteroid on a collision course with the Earth, and found that blown away fragments of the asteroid will probably reformed to him because of the severity.
The most likely answer is to leave the area, which the asteroid is expected to face in, especially if the asteroid is less than 50 meters (164ft) in diameter.
Mr. Bridenstine said three devastating asteroid impacts that have occurred over the last century.
The latest, he said, occurred in 2013, when a meteor exploded over the Russian city of Chelyabinsk, injuring hundreds of people.
He briefly eclipsed the sun and caused severe burns to the observer below, as well as breaking windows and rattling buildings.
Researchers say that the more solid rock would cause more damage and casualties.
Chelyabinsk meteorite was at his bright and hot when it was 18 miles above the Earth. Its speed at this time was calculated at 40,000mph, or 11.6 miles per second.
This means that the stone, which was originally the size of double-decker bus was traveling at 20 times the speed of a bullet.
It was the largest on the & # 39; an object to hit the Earth with the Tunguska in 1908, when exploding comet or asteroid has destroyed 2,000 square kilometers of Siberian forest.
Mr. Bridenstine warned that one model suggests a similar asteroid events can occur every 60 years, and that Hollywood has offered a false sense of security in believing humanity can save itself necessarily.