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February 4
Space to thrive
A plan to overhaul America’s space agency is long overdue
Feb 3rd 2010 | From The Economist print edition
AP
IN 2004 George Bush announced a plan for America’s space agency, NASA, to return to the moon by 2020, land there, explore the surface and set up a base. The moon would then serve(被当做……,学习了) as a staging post(补给站) for a journey to Mars. It was, unfortunately, unclear how this modest proposal would be paid for and, as work began and costs spiralled(飙升,好词,抱走), the “vision” seemed more science fiction than science.(看上去更像科幻小说而非科学。好句子,抱走
)
On February 1st, reality caught up. The back-to-the-moon programme, Constellation, with its Ares rocket (pictured), fell victim to Barack Obama’s need to find cuts. The Office of Management and Budget described it as over budget(将……描述成……), behind schedule and lacking in innovation due to a failure to invest. The office also said Constellation had sucked(拍案叫绝的拟人,吸) money from other, more scientific programmes, such as robotic space exploration and Earth observation.
Much has been made of the fact that NASA will, as a consequence of Constellation’s cancellation, have to rely on private firms to send its astronauts to the international space station once the space shuttle is withdrawn. In many ways, though, this is the least interesting aspect of what is happening, for what Mr Obama proposed is actually a radical overhaul (彻底大修)of the agency.
Success is an option
The rethink (重新考虑,有趣的词)looks at four areas: new ways of getting into space; extending the life and use of the space station; the agency’s relationship with the private sector; and its scientific mission(使命). The first part of the plan, known as the transformative technology initiative, will cost $7.8 billion over five years. It will develop orbiting fuel depots(轨道燃料库), rendezvous-and-docking(交会和对接) technologies, advanced life-support systems that recycle all of their materials, and better motors for spacecraft. The agency will also develop new engines, propellants(推进剂) and materials as part of a $3.1 billion heavy-lift programme, to allow it to send craft well beyond Earth, while $4.9 billion is allowed for advances in areas such as sensors(传感器), communications and robotics.
The second part of the plan is to postpone the death of the space station from 2016 to 2020. More science will be done there (cynics might take issue with the word “more”) and there will, specifically, be research into biology, combustion(燃烧) and materials science. There will also be more emphasis(重点)
on space medicine, and the station is to get a centrifuge(离心机). This will allow people to experience artificial gravity in space, which may be important for long-term missions to places such as Mars. Inflatable “space habitats” were mentioned, and these might be used to build extensions to the space station on the cheap. All this will please the station’s other participants—Canada, Europe and Japan—which have invested a lot in it for, as yet, little return. It will also help build a coalition (同盟)of countries that want to travel farther into the solar system.
Now Constellation is cancelled, the plan’s third part is to encourage private firms to provide transport to and from the space station. Such journeys into low Earth orbit do not need the heavy-lifting oomph that more wide-ranging missions require, so the proposal is to contract out all of this local delivery work. In fact, such a scheme(计划) already exists, and 20 cargo missions by two firms, SpaceX and Orbital Sciences, are planned. The scheme will be extended to include at least two other companies, Boeing and Sierra Nevada Corporation.
Under the new regime(管理体制), companies will get fixed-price contracts instead of being paid on a “cost plus” basis. The risks and burdens (负担)of developing transport to low Earth orbit will thus fall to the private sector. According to Mike Gold of Bigelow Aerospace, a firm that hopes to build inflatable space habitats, such fiscal rectitude has been met with criticism from a surprising quarter: Republican politicians. Bill Posey, who represents Florida in Congress, described it as a “slow death (慢性死亡,构词法)of our nation’s human space-flight programme”. “If you could fuel a rocket on hypocrisy(虚伪),” Mr Gold suggests, “we’d be on Pluto by now.”
The last part of the plan is for more science. The Earth-observation programme will receive some $2 billion to improve the forecasting of climate change and monitor the planet’s carbon cycle and its ice sheets. As part of this, NASA will replace the Orbiting Carbon Observatory, a satellite that was lost a year ago, and which was supposed to identify the world’s sources, and sinks, of carbon dioxide(二氧化碳).
There will also be a new emphasis on robotic missions, which are vastly cheaper than manned ones, and cause less angst(烦恼) if they blow up. The first robot destination will be the moon. There will also, according to Charlie Bolden, NASA’s administrator, be a mission to the sun, to study the solar wind, and one to improve the agency’s ability to detect (发觉)and catalogue interesting (but potentially dangerous) asteroids(小行星,红宝词汇) that pass near Earth.
It all, then, adds up to a radical shift—but a sensible one after years of fantasy. As Lori Garver, Mr Bolden’s deputy, put it, “the old plans lost us the moon. This gives us back the solar system.”(这一整段的论述与Issue和Argument相似,是非常实用的总分总~) |
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