A collection of asteroids found by astronomers at the Southwest Research Institute of the United States is quite a lot. In fact, they can not find out the parent asteroids that are in the collection.
"This asteroid is a kind of family that has no name and identity, because we can not ascertain who it is, who was the first asteroid to cause such large fragments," said astronomer Kevin Walsh as quoted by First Post.
"They are so old, if it is about 4 billion years old, even formed before the giant gas planes outside the Solar System move into their orbit now," he continued.
According to the theory of astronomers, the movement of giant gas planets into orbit in the Solar System causes shocks on the asteroid belt (region). As a result, shocks cause the asteroids to rupture and spread to some nearby locations.
However, astronomers believe if the asteroid fragments are spread outside the belt. Because the asteroid orbits the Sun and its light can heat the asteroid slowly. This results in radiation potentially shifting asteroid fragments from outside its territory.
Therefore, astronomers are looking for fragments of asteroids that fly from their territory. "The asteroid fly rate depends on the size of the smaller, faster, but bigger ones slower," said Marco Delbo, astronomer from the Cote d'Azur Observatory in France.
These old asteroid fragments do not potentially threaten Earth. He was certainly far from Earth's orbit. However, NASA anticipates the arrival of asteroids into Earth orbit by searching for dangerously claimed asteroids.
Known, over the past two decades, NASA has been constantly searching for dangerous asteroids that could threaten the Earth with a size of more than 1 kilometer.
United States space agency is claimed to have succeeded by penetrating the 98 percent of them.