750 thousand, how does the aerospace rubbish of 28 thousand kilometer meet speed per hour affect the

Since Siputenike since 1 entered outer space 1957, the mankind had launched many satellite to the middle of earthly orbit. After discarding as useless when these satellites, they will become aerospace rubbish, circling the earth to rotate ceaselessly. As aerospace rubbish problem in recent years more and more be paid close attention to, it already became an environment to learn the problem that the home and astrophysical home pay close attention to jointly. This problem caused intense debate, so, what effect can aerospace rubbish have to earthly environment and air?

According to estimation, aerospace middle reaches is swinging to amount to rubbish of 750 thousand aerospace, they with about the speed of 7.8 kilometers is in every second the high speed in aerospace moves. If normal orbiter mixes these aerospace fragment dash against aerospace airship, will cause quite serious destruction.

According to hall of general affairs of U.N. deep space (UNOOSA) , at present about 5000 satellites surround the earth flies, it is normal to have among them about 2000 satellites are in move, still additionally 3000 had discarded as useless. The satellite that these discarding as useless just floats in aerospace, awaiting final return aerosphere. And before this, had had aerosphere of many satellitic reentry earth.

In fact, the aerospace fragment every other of chunk can enter aerosphere a few days afresh, but the ocean that because region of partition of tellurian greater part is unmanned,lives, so we witness them lesser. If you once had seen a shooting star in night, so, you are possible saw with one's own eyes witnessed an aerospace fragment with horary the speed return aerosphere of 28 thousand kilometer, and burn danger.

The aerospace fragment that at present many 750 thousand already affirmed is in our heavenly body in the sky everywhere flap, spaceflight orgnaization is monitoring their position and movement closely, in order to ensure other the safety in course satellite and the new satellite that will launch namely. In addition, return know exactly about sth with 1 million plan small fragment was not dogged continuously, because their motion speed is splitting, and volume is too minor, make them very difficult be tracked effectively.

Now, when the scientist is designing the course of orbiter and aerospace airship, what they must consider to drift to be brought in the fractional place in aerospace is minatory. Besides to aerospace medium normal satellite causes an effect besides, aerospace rubbish may return the effect that can cause to tellurian environment, especially those cross aerosphere to danger without combustion, fall finally tellurian fragment.

Scientist estimation, have aerosphere of earth of reentry of fragment of 80 tons of aerospace every year about, can be for the most part among them in atmosphere combustion dangers, still a few fall to go up to the earth in the condition that was not noticed. Unfortunate is, certain thing upblaze did not mean them to disappear. The high temperature that attrition produces may decompose these fragments and make they melt, but these chemical composition still are releasing atmosphere in. A few compound metals and polymer (high polymer compound) can use up ozone actually, because cross aerosphere when them,this is when combustion, can produce chemical reaction to produce one oxidation nitrogen, and one oxidation nitrogen can use up ozone.

Nevertheless, the world is very great still, although every year so much fragment bumps,answer earthly aerosphere so, but they are opposite at present environmental influence is negligible also not plan. The mankind is mixed to ozonosphere in tellurian activity the negative effect that climate causes, exceed those falling go to far tellurian aerospace rubbish.

Rubbish of aerospace of some people concern can fall down from inside aerospace break them, but this kind of probability is extremely low. Since 62 years since the mankind begins to launch a satellite to aerospace in, the aerospace fragment that somebody is fallen hits have record event once.

Although aerospace rubbish still won't cause direct menace to tellurian environment now, but cannot ignore them to be opposite the influence of environment of close ground orbit. People always thinks human destiny depends on the life of the sun, but should accomplish this, one of the basiccest precondition are the mankind capable to leave the world. Pile up as more and more aerospace rubbish and surround the earth rotates, bring about a rocket to be blasted off to will become more difficult in aerospace by safety.

If the orbiter amount in close ground orbit increases continuously, when future half century, this meeting increases the risk that aerospace rubbish collides significantly. Be in even more distant future, may cause an aerospace disaster -- Kaisile is asked for integratedly (Kessler Syndrome) . According to astrophysical home, before bureau of American space navigation (NASA) scientist Donald Kaisile (Donald J. Kessler) tentative idea, collision can produce a large number of additional fragments, these fragments will bump more satellites, cause annihilative chain reaction thereby. Although this is happening impossibly inside a few years, but the scientist is unavoidable express concern for this.

Although aerospace rubbish has not caused the crisis, but the scientist has begun to think method clears the rubbish in aerospace. A few scientists think, can use ground laser to clear the aerospace rubbish that has menace, perhaps use space robot to collect aerospace rubbish. If we cannot control the amount of aerospace rubbish effectively, so, prospective mankind will face aerospace congested awkward situation.