首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Small But Wise On December 14, NASA blasted a small but mighty telescope in...
Small But Wise On December 14, NASA blasted a small but mighty telescope in...
admin
2020-12-24
20
问题
Small But Wise
On December 14, NASA blasted a small but mighty telescope into space. The telescope is called WISE and is about as wide around as a trashcan (垃圾箱). Don’t let its small size fool you: WISE has a powerful digital camera, and it will be taking pictures of some of the wildest objects in the known universe,including asteroids (小行星),faint stars, blazing galaxies and giant clouds of dust where planets and stars are born.
“I’m very excited because we’re going to be seeing parts of the universe that we haven’t seen before,” said Ned Wright,a scientist who directs the WISE project.
Since arriving in space, the WISE telescope has been circling the Eatlh,held by gravity in a polar orbit (this means it crosses close to the north and south poles with each lap). Its camera is pointed outward,away from the Earth,and WISE will snap a picture of a different part of the sky every 11 minutes. After six months it will have taken pictures across the entiresky.
The pictures taken by WISE won’t be like everyday digital photographs,however, WISE stands for “Wide-field lnfrared (红外线的)Survey Explorer."As its name suggest, WISE camera takes pictures of features that give off infrared radiation.
Radiation is energy that travels as a wave. Visible light,including the familiar spectrum of light that becomes visible in a rainbow, is an example of radiation. When an ordinary digital camera takes a picture of a tree, for example,it receives the wavM that are reflected off the tree. When these waves enter the camera through the lens, they’re processedbythecamera,which then puts the image together.
Waves of infrared radiation are longer than waves of visible light,so ordinary digital cameras don’t see them,and neither do the eyes of human beings. Although invisible eye,longer infrared radiation can be detected as warmth by the skin.
That’s a key idea to why WISE will be able to see things other telescopes can’t. Not everything in the universe shows up in visible "ght. Asteroids,for example,are gia时 that float through space — but they absorb most of the light that reaches them. They don’t reflect light,so they’re difficult to see. But they do give off Mrared radiation,so an infrared telescope like WISE will be able to produce images of them. During its mission WISE will take pictures of hundreds of thousands of asteroids.
Brown dwarfs (矮星)are another kind of deep-space object that will show up in WISE’s pictures. These objects are “failed” stars — which means they are not massive enough to jump start the same kind of reactions that power stars such as the sun. Instead, brown dwarfs simply shrink and cool down. They're so dim that they’re almost impossible to see with visible light,but in the Mrared spectrum they glow.
What is so special about WISE?
选项
A It is as small as a trashcan.
B It is small in size but carries a large camera.
C tts digital camera helps astronomers see the unknown space.
D Never before has a telescope carried a digita! camera into space.
答案
C
解析
A显然不是WISE特别之处,B、D与事实不符。
转载请注明原文地址:https://ti.zuoweng.com/ti/wzsQKKKQ
相关试题推荐
AStarIsBorn 1TheVLT(VeryLargeTelescope)istheworld’slargestteles...
AStarIsBorn 1TheVLT(VeryLargeTelescope)istheworld’slargestteles...
AStarIsBorn 1TheVLT(VeryLargeTelescope)istheworld’slargestteles...
AStarIsBorn 1TheVLT(VeryLargeTelescope)istheworld’slargestteles...
AStarIsBorn 1TheVLT(VeryLargeTelescope)istheworld’slargestteles...
SmallButWise OnDecember14,NASAblastedasmallbutmightytelescopein...
SmallButWise OnDecember14,NASAblastedasmallbutmightytelescopein...
SmallButWise OnDecember14,NASAblastedasmallbutmightytelescopein...
SmallButWise OnDecember14,NASAblastedasmallbutmightytelescopein...
共用题干 AStarIsBorn1TheVLT(VeryLargeTelescope)istheworld'slargest...
随机试题
某国的政治风险评级(PR)为75,财务风险评级(FR)为45,经济风险评级(ER
当事人对已经发生法律效力的判决,认为有错误的,只要向原审人民法院申请再审,该判决
患者男性,66岁,平素腰酸耳鸣,头痛眩晕,突发口舌歪斜,言语不利,舌红苔薄,脉弦
“当斯大林逝世之际……俄罗斯当时是世界上数一数二的强国!那些指责斯大林的人却用其
以下关于地役权说法中,正确的有()。
流行性出血热低血压休克期的主要特点是
影响固定桥固位的因素是()A.基牙受力的运动方式B.基牙的数目C.基牙的高度D.基牙的聚合角E.桥的长短
关于建设工程质量监督档案管理的说法,正确的是()。A.按照单位工程建立,经监督机构负责人签字后归档B.按照单项工程建立,经监督机构负责人签字后归档C.
根据不同的管理需要和本质特性,银行资本有()三个概念。A.账面资本B.经济资本C.监管资本D.实收资本E.经营资本
金莱客餐厅是一家经营传统韩食的餐馆,其需要的员工数量是可变的,因此餐厅有一批兼职员工,在餐馆举办大型活动或宴会的时候随叫随到,此外,全职员工也可能在需要时...