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02 news of the week@SCIENCE ----------报道一已有1人参与

感觉还是每篇报道开一个贴更清楚些，相关讨论也都是跟在这片报道下面的。不知道这么做会不会让版面看起来有点乱，看起来满版的科研快讯，还是都贴到一个帖子下面好，大家给点意见。

Tucson, Arizona 1
Smooth Mirror for Giant Telescope
巨型望远镜的光滑（很别扭，是光滑的意思么）镜片

Twenty tons of glass—that’s what went into casting the first of seven mirrors that comprise the light-collecting area of the 25-meter Giant Magellan Telescope (GMT). The 8.4-meter-diameter, single-piece mirror was finished last week. The GMT will peer at the heavens from a remote Chilean mountaintop when it is ready for operations by the end of this decade.

20吨重的玻璃仅仅铸造了一块镜片！25米大的巨型麦哲伦望远镜（GMT）需要7块镜片来组成它的聚光区，这块上周完工直径达8.5米的镜片就是其中之一。在2020年之前GMT开始履行使命，届时它将会在遥远的智利山上凝望着太空。

The mirror was cast using a technique pioneered by University of Arizona astronomer Roger Angel. It has been polished to such a high degree of precision that any surface aberrations lie within a margin onetwentieth the wavelength of light.

铸造该镜片的时候，采用了亚利桑那大学天文学家Roger Angel首先提出来的技术。镜片的抛光度被控制到非常精密的程度：任何面上的像差都小于光波长的1/20。

Six other such mirrors will be fashioned over the next few years. Assembled into a floral design, they will collect enough light to produce images of unprecedented sharpness, helping researchers answer fundamental questions in astrophysics, planetary science, and cosmology.

其余6面镜片会在未来几年内完工，到时候组装成花瓣结构的镜片组，能聚集足够的光，从而产生图像能有前所未有的锐度。这将帮助研究者解答一些在天文学，行星学和宇宙学方面的重大问题。

Completion of this First mirror should bolster ongoing efforts to raise funds for the $1 billion project（如何翻译）, which has so far received commitments of about $300 million from its various partners.

这次第一面镜片的完工无疑会促使大家更加努力地去筹集10亿美元的项目资金。到目前为止，项目合作各方已经承诺的援助资金大约有3亿美元。

[ Last edited by myIDname on 2012-11-6 at 10:15 ]

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