By the Earth is approaching a huge asteroid with a diameter of 400 meters (that's almost an aircraft carrier). It is the largest space object that will fit on a dangerous distance to our planet since 1976. The next time this will happen only in 2029, when close to Earth asteroid Apophis will fly, according to The Associated Press.
Apophis is much less, only 270 meters in diameter, but it is closer to our planet at a distance of only 37 — 38 thousand kilometers. Asteroid 2005 YU55, at the same time will fly past Earth at a distance of 325 million kilometers. The closest to us it will be on Tuesday, November 8.
To the Moon 2005 YU55 fly up even closer, at a distance of 240 million kilometers. As a result, it turns out that the trajectory of the asteroid will be inside the orbit of the Moon. However, this does not mean that it will fly between the Earth and the Moon: The moon at this point will make his next turn around our planet, and 2005 YU55 will sweep past both a speed of 13 km / s.
In the case of this size asteroid collision with the Earth it would cause an earthquake of magnitude 7 or tsunami up to 20 meters (if it fell into the ocean). At the crash crater was formed to a depth of more than six kilometers and a diameter of 500 meters. If 2005 YU55 down in populated areas, this would lead to a huge number of victims.
For the Moon collision with an asteroid, too, would be palpable. As reported by Space.com, there would be a crater with a diameter of four kilometers. However, in the last satellite of the Earth, and not as experienced. The largest lunar crater reaches a diameter of 2.5 thousand kilometers. This means that once there fell a really huge asteroid.
According to scientists, the large asteroids fall to Earth on average once every 100 million years. In exceptional cases, they may pose a threat to the existence of life on our planet as it was during the mass extinction of dinosaurs 65 million years ago. For the actual Earth asteroids and the Moon are not a threat. So as to destroy the moon, the space body will need about the same size as those giant asteroids in the solar system is not there.