Headline - observation program Near-Earth Object (NEO) of the United States Space Agency (NASA) meriilis a map which shows that during the last 20 years, the Earth has been bombarded by nearly 556 space rock.
Of the hundreds of asteroids that struck the Earth's surface, having no one size larger meters to nearly 20 meters. This asteroid data obtained and compiled by the US government censorship based on the detection of infra-sound.
However it turns out, a large asteroid with a diameter of 55 meters and a mass of 10,000 tons that enter the Earth's atmosphere in Chelyabinsk, Russia, not including the count as they explode in the sky before it hits the ground. This asteroid strikes injuring a thousand people and caused losses of up to US $ 33 million.
In fact, according to NASA, is the largest natural phenomena perceived by the Earth. The biggest hit from an asteroid during the period mapping the US Government's Agency of the year 1994-2013.
According to NASA, reported by the Daily Mail, Tuesday, November 18, 2014, the asteroid merupakana space objects orbiting the Sun with a large enough size, meter size can be calculated. Meanwhile, the meteor that often fall to Earth, the relatively small size, the size of a stone.
NASA expects the NEO program can help scientists regarding the information to detect and track space rock, which has the potential dangers threatening human and other beings on Earth.
"The new data from the NEO could help scientists to improve estimates of the threat of asteroids, before they (asteroids) fell back to Earth," said NASA NEO Program Manager at the Jet Propulsion Laboratory quoted from page rt.com.
In the study of Earth's history shows around 5,000 years ago there was a space objects that have an area the size of a football field hit the Earth, where the asteroid caused significant damage to affect global climate change. (art)