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myIDname木蟲 (著名寫手)
人民大會堂首席清潔工
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[交流]
2012/11/02 news of the week@SCIENCE ----------報道一 已有1人參與
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感覺還是每篇報道開一個貼更清楚些,相關(guān)討論也都是跟在這片報道下面的。不知道這么做會不會讓版面看起來有點(diǎn)亂,看起來滿版的科研快訊,還是都貼到一個帖子下面好,大家給點(diǎn)意見。 Tucson, Arizona 1 Smooth Mirror for Giant Telescope 巨型望遠(yuǎn)鏡的光滑(很別扭,是光滑的意思么)鏡片 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噸重的玻璃僅僅鑄造了一塊鏡片!25米大的巨型麥哲倫望遠(yuǎn)鏡(GMT)需要7塊鏡片來組成它的聚光區(qū),這塊上周完工直徑達(dá)8.5米的鏡片就是其中之一。在2020年之前GMT開始履行使命,屆時它將會在遙遠(yuǎn)的智利山上凝望著太空。 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. 鑄造該鏡片的時候,采用了亞利桑那大學(xué)天文學(xué)家Roger Angel首先提出來的技術(shù)。鏡片的拋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長的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面鏡片會在未來幾年內(nèi)完工,到時候組裝成花瓣結(jié)構(gòu)的鏡片組,能聚集足夠的光,從而產(chǎn)生圖像能有前所未有的銳度。這將幫助研究者解答一些在天文學(xué),行星學(xué)和宇宙學(xué)方面的重大問題。 Completion of this First mirror should bolster ongoing efforts to raise funds for the $1 billion project(如何翻譯), which has so far received commitments of about $300 million from its various partners. 這次第一面鏡片的完工無疑會促使大家更加努力地去籌集10億美元的項(xiàng)目資金。到目前為止,項(xiàng)目合作各方已經(jīng)承諾的援助資金大約有3億美元。 [ Last edited by myIDname on 2012-11-6 at 10:15 ] |

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