A giant asteroid could hit Earth in 2014. U.S. astronomers have warned that the British space monitors.

But don't worry because of the possibility of a big disaster is only one in 909,000 cases.

Asteroid "2003 QQ47" will be monitored more closely in the next two months. probably will occur March 21, 2014, but astronomers say the risk of collision may be reduced by the amount of data is collected

The impact, the collision has the same effect with 20 million Hiroshima atomic bombs, says Centre Near Earth Object Information British Government.

Asteroids like a 2003 QQ47 are chunks of rock crashing of the formation of the solar system 4.5 billion years ago. Most are at a safe distance from Earth in the region between Mars and Jupiter.

But the gravitational influence of large planets like Jupiter could make an asteroid out of orbit and headed to Earth.