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| Space junk illustration. (space.com) |
Human trip into space conducted for approximately 60 years, it still leaves the problem, namely the space junk. Because, as the human journey into space the amount of space junk in Earth orbit continues to grow.
Space junk can be defined as an object that had been left in Earth orbit or the result of collision of two objects when there are space missions.
The presence of space junk in Earth orbit Area can be a problem because the debris risk of colliding with one another. Moreover, any such debris has a speed of circulation, and when collide with each other can cause considerable damage.
Not only that, there is the possibility that one day it will lose its density debris while in orbit. And, that's when there is a possibility that debris will collide with each other and produce other advanced collision. A phenomenon known as the Kessler effect.
The matter was then being contemplated completion by researchers. Therefore, with such circumstances it would be almost impossible to send a satellite into space. It can happen because each satellite that sent the space will be destroyed so collided with space junk.
Possibility of future astronauts will begin to shift away from the earth's orbit when it will carry out the mission. It is necessary to avoid a collision that may occur with such debris.
As information, the first known space junk comes from the rocket body used in the launch of Sputnik, the first artificial satellite of the earth, on October 4, 1957. The launch of Sputnik by the Soviet Union times and then encourage other countries to begin to explore outer space.
Since then, there have been more than thousands of satellites, rocket bodies and debris from space missions earth orbit. And, in 2000, the space junk in Earth orbit is estimated to number about 9,000.
The number does not change much until finally in 2007, China tested missiles and produce 2,000 debris in outer space. Subsequently, in 2009, due to two satellites collided increase the amount of debris to about 2,000.
Seeing the amount of space junk that continues to grow, Dr Stuart Gray, a lecturer at University College London, made a short video about the increasing amount of space junk in orbit the Earth every year. And, for those who are interested in seeing the addition of space junk for approximately 60 years.
