Out planet is just a little part among all we do not know. We have needed many years in order to develop starts, planets... Maybe, wi will even need much more tome to understand, for example, space debris. This unknown element can come from others planets or, even, thrown by someone/something. Nowadays, space debris have been fallen recently and it can destroy some places.
Space debris is the collection of manmade defunct objects in orbit around Earth (rocket stafes, old satellites and fragments from desintegration, erosion and collisions). Space debris is a problem that is gaining importance. These fragments make difficult going out to space. Experts recognize that this problem is complicated and expensive and would be difficult to solve it.
In addition, it is necessary, to solve this problem, sending cosmic debris truck to collect waste, but it is very cost, and this price can be around 600,000$. Some experts are trying to develop some techniques to destroy most of them, some of them are: building a lasers or harpoons.
We are surrounded by unknown things and we do not know enough about the space. Also, when we find everything about the space, it may be too late. How ever, we have enough experts to solve the problem of the space debris. When we finish with these elements we could go out to space more calmly.
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