中国天眼FAST发现三颗新脉冲星_科学技术

中国天眼FAST发现三颗新脉冲星

文章来源：未知文章作者：enread 发布时间：2017-12-12 07:30 字体： [大中小]　进入论坛

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The China-based FAST, the world's largest single-dish radio telescope, has discovered three new pulsars, the National Astronomical¹ Observatories² of China (NAOC) said Tuesday.

中国科学院国家天文台周二表示，世界最大的单碟射电望远镜FAST发现三颗新脉冲星。

So far, FAST has identified a total of nine pulsars since its trial operations began in September 2016.

According to Zhang Shuxin, deputy chief of the NAOC's Guizhou branch, the discovery of more pulsars will be common for FAST in the future.

Li Di, chief scientist of the NAOC radio astronomy division, in an earlier interview predicted that when FAST starts formal operations in 2019, it will find more than 100 pulsars each year.

Pulsar observation is very important as it can be used to confirm the existence of gravitational radiation and black holes and help solve many other major questions in physics.

Located in a naturally deep and round karst depression in southwest China's Guizhou Province, FAST stands for Five-hundred-meter Aperture³ Spherical⁴ Radio Telescope. It has a receiving area equivalent to about 30 football fields.

FAST's key tasks include observation of pulsars as well as exploration of interstellar molecules⁵ and interstellar communication signals.

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收听单词发音

1 astronomical
adj.天文学的，（数字）极大的
参考例句：
He was an expert on ancient Chinese astronomical literature.他是研究中国古代天文学文献的专家。 Houses in the village are selling for astronomical prices.乡村的房价正在飙升。

2 observatories
n.天文台，气象台( observatory的名词复数 )
参考例句：
John Heilbron, The Sun in the Church: Cathedrals as Solar Observatories, 3-23. 约翰．海耳布隆，《教会里的太阳：教堂即太阳观测台》，第3-23页。来自互联网 Meteorologists use satellites, land observatories and historical data to provide information about the weather. 气象学家使用卫星、上天文台和历史资料来提供有关天气的信息。来自互联网

3 aperture
n.孔，隙，窄的缺口
参考例句：
The only light came through a narrow aperture.仅有的光亮来自一个小孔。 We saw light through a small aperture in the wall.我们透过墙上的小孔看到了亮光。

4 spherical
adj.球形的；球面的
参考例句：
The Earth is a nearly spherical planet.地球是一个近似球体的行星。 Many engineers shy away from spherical projection methods.许多工程师对球面投影法有畏难情绪。

5 molecules
分子( molecule的名词复数 )
参考例句：
The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。 Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。

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