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Space Debris: What Are We Waiting For?

机译:太空碎片:我们还在等什么?

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Space debris threatens not only spacefaring nations but all people who rely on the myriad services empowered from space: telecommunications, weather, space exploration, Earth observation, space science and national security. In short, debris is an international problem for all humankind. Moreover, much debris is at high-enough altitudes that it could threaten space assets for hundreds of years before final destruction upon Earth re-entry. Orbital debris is a long-lived problem threatening future generations. The recently released U.S. National Research Council study on NASA's meteoroid and orbital debris programs highlighted that the debris hazard has increased in severity and scope in the last decade, just as it has every decade previously since the dawn of the space age. Recent analysis shows that regions in low Earth orbit (LEO) have officially exceeded the critical population density whereby on-orbit collisions will create more debris than can be cleansed by atmospheric drag. Once this point is reached, the debris population will grow exponentially even without any new launches. It is not a question of "if" the debris environment will cascade out of control without new space launches; without active intervention, it is only a matter of "when." If future launches leave more mass on orbit, then, together with other deliberate collisions and accidental explosions, the deleterious growth of debris will accelerate.
机译:空间碎片不仅威胁航天国家,而且还威胁所有依靠太空提供的无数服务的人:电信,天气,太空探索,地球观测,空间科学和国家安全。简而言之,碎片是全人类的国际问题。此外,许多碎片处于足够高的海拔高度,可能在数百年后威胁到太空资产,然后地球再次进入最终破坏。轨道碎片是一个长期存在的问题,威胁着后代。美国国家研究委员会(National Research Council)最近发布的关于NASA流星体和轨道碎片计划的研究强调,在过去十年中,碎片危害的严重性和范围不断扩大,就像自太空时代黎明以来的每十年一样。最近的分析表明,低地球轨道(LEO)的区域已正式超过临界人口密度,在轨道上发生的碰撞将产生比大气阻力可清除的碎片更多的碎片。一旦达到这一点,即使没有任何新的发射,碎片的数量也会成倍增长。这不是“碎片”环境是否会在没有新的空间发射的情况下失控地级联的问题。没有积极的干预,这仅仅是“何时”的问题。如果将来的发射使更多的质量留在轨道上,那么,加上其他故意的碰撞和意外爆炸,碎片的有害增长将加速。

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    《Space news》 |2011年第46期|p.1721|共2页
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