Scientists Expect ‘Unexpected’ from Largest Ground-based Telescope
时间：2018-12-16 作者：英语课 分类：VOA标准英语2016年(五月)
Scientists Expect ‘Unexpected’ from Largest Ground-based Telescope
The mirror of the Hubble Space Telescope that gave the world stunning 1 pictures of deep space is about 4.5 square meters.
Compare that with the primary mirror of the James Webb Space Telescope, which will be 25 square meters — and which is creating big expectations for even higher-quality results when it is deployed 2 in 2018.
But both will be dwarfed 3 by the Giant Magellan Telescope, which is under construction in Chile's Atacama Desert. Its mirror array covers about 368 square meters.
By looking at different parts of the visible and infrared 4 spectrums, the two new telescopes will complement 5 each other, Magellan Telescope director Patrick McCarthy said.
'Complete picture'
"The two working together, I think, will give us a complete picture, whether we are looking at planets around nearby stars, black holes in the centers of other galaxies 6, or back to that early universe that we call the First Light, when we see the first stars in the first galaxies," McCarthy said.
To isolate 7 it from vibrations 8, the 1,200-ton telescope will rest on an oil flotation bearing system, completely free of any friction 9. A range of cameras and spectrographs will record and dissect 10 the received light, looking for signatures of atoms and molecules 11. And the light coming from billions of kilometers away may be impossibly faint.
"The photons come in once every 15 to 20 minutes, so it takes a long time to collect that light,” McCarthy said. “In our case, we think we'll get a few photons a minute, but you need hundreds to get a good signal, so it just takes patience."
What to expect
But with a telescope sensitive enough to detect a birthday candle on the moon, nobody knows what to expect.
"The most important is the unexpected,” McCarthy said. “The new discoveries, the unanticipated breakthroughs. That's always been the story of astronomy. When you build a new capability 12, young people find things that either no one expected, or they prove that their elders were wrong."
The $1 billion joint 13 project of the U.S., Australia, Brazil, South Korea and Chile is expected to open for the first observations by 2022 and be fully 14 operational by 2026.
- His plays are distinguished only by their stunning mediocrity.他的戏剧与众不同之处就是平凡得出奇。
- The finished effect was absolutely stunning.完工后的效果非常美。
- Tanks have been deployed all along the front line. 沿整个前线已部署了坦克。
- The artillery was deployed to bear on the fort. 火炮是对着那个碉堡部署的。
- The old houses were dwarfed by the huge new tower blocks. 这些旧房子在新建的高楼大厦的映衬下显得十分矮小。
- The elephant dwarfed the tortoise. 那只乌龟跟那头象相比就显得很小。 来自《简明英汉词典》
- Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
- Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。
- The two suggestions complement each other.这两条建议相互补充。
- They oppose each other also complement each other.它们相辅相成。
- Quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
- We still don't know how many galaxies there are in the universe. 我们还不知道宇宙中有多少个星系。
- Do not isolate yourself from others.不要把自己孤立起来。
- We should never isolate ourselves from the masses.我们永远不能脱离群众。
- We could feel the vibrations from the trucks passing outside. 我们可以感到外面卡车经过时的颤动。
- I am drawn to that girl; I get good vibrations from her. 我被那女孩吸引住了，她使我产生良好的感觉。 来自《简明英汉词典》
- When Joan returned to work,the friction between them increased.琼回来工作后，他们之间的摩擦加剧了。
- Friction acts on moving bodies and brings them to a stop.摩擦力作用于运动着的物体，并使其停止。
- In biology class we had to dissect a frog.上生物课时我们得解剖青蛙。
- Not everyone can dissect and digest the public information they receive.不是每个人都可以解析和消化他们得到的公共信息的。
- 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。
- She has the capability to become a very fine actress.她有潜力成为杰出演员。
- Organizing a whole department is beyond his capability.组织整个部门是他能力以外的事。