首页
登录
职称英语
[originaltext]Astronomers have discovered a potentially habitable planet of sim
[originaltext]Astronomers have discovered a potentially habitable planet of sim
游客
2024-05-15
5
管理
问题
Astronomers have discovered a potentially habitable planet of similar size to Earth in orbit around a nearby star. A team of planet hunters spotted the alien world circling a red dwarf star called Gliese 581, 20 light years away. The planet is in the “Goldilocks zone” of space around a star where surface temperatures are neither too hot nor too cold for liquid water to form. If confirmed, the planet would be the most Earth-like that has ever been discovered in another solar system and the first strong contender for a habitable one. More than 400 exoplanets have been discovered by astronomers, but most are gas giants, like Jupiter, that would be inhospitable to life as we know it. Astronomers used the Keck telescope in Hawaii to study the movement of Gliese 581 in exquisite detail and from their observations inferred the presence of a number of orbiting planets. The team report two new planets in the Astrophysical Journal, bringing the total number known to be circling the star to six. One of the planets, named Gliese 581g, has a mass of three to four times that of Earth and takes 37 days to orbit the star. Astronomers believe it is a rocky planet with enough gravity to retain an atmosphere. Unlike the previously discovered planets, Gliese 581g lies squarely in the region of space where life can thrive. One side of the planet is always facing the star, much as one side of the moon constantly faces Earth. The average temperature on the planet is estimated to be between -31 to -12℃, but the ground temperature would vary from blazing hot on the bright side and freezing on the dark side.
Questions 32 to 35 are based on the passage you have just heard.
32. What can we learn about Gliese 581?
33. How many planets are circling Gliese 581 so far as we know?
34. What do astronomers think of the planet Gliese 581g?
35. In what aspect does Gliese 581g resemble the moon?
选项
A、It has the identical inner structure to Earth.
B、It has a mass of four to six times that of Earth.
C、It takes 73 days to orbit the star Gliese 581.
D、It has enough gravity to hold an atmosphere.
答案
D
解析
选项中的It,identical...to Earth,orbit the star,has...gravity等表明,It指代某个星球,本题考查该星球的情况。短文中提到,天文学家相信Gliese 581g行星是一颗岩态行星,其重力足以形成大气层,[D]是该行星的特点之一,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3599707.html
相关试题推荐
[originaltext]InBritainthereare11nationaldailynewspapersmidmostpe
[originaltext]InBritainthereare11nationaldailynewspapersmidmostpe
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]M:Weseemtobehavingthisconversationoverandoveragain.W:
[originaltext]M:Hey,Amy,whereareyouoffto?W:TotheRecreationCenter.I
[originaltext]M:Hey,Amy,whereareyouoffto?W:TotheRecreationCenter.I
[originaltext]W:I’mreallylookingforwardtothistripwithourgeologyclass
[originaltext]W:I’mreallylookingforwardtothistripwithourgeologyclass
[originaltext]Yuppiesareyoungpeoplewhocamalotofmoneyandliveina
[originaltext]Yuppiesareyoungpeoplewhocamalotofmoneyandliveina
随机试题
TodayIwouldliketotellyouabouttheeffectsofoldageonhealth.Actua
Wemadeaneffortnottoleavemyfriendoutinthecoldwhenwewereplanningt
[audioFiles]audio_eufm_j01_176(200910)[/audioFiles]A、Theywanttogodowntown.
[originaltext]Millionsofwordshavebeenwrittenaboutyoungpeopleinthe
下列关于手册的叙述,不正确的是( )。A.手册汇集某一或若干学科或专业领域的基
水电站的电量效益系指( )。A.水电站多年平均发电量 B.水电站多年平均发电
知识获得的首要环节是知识直观。
某证券公司拟设立全资期货公司,期货公司注册资本为1亿元,拟以2500万元人民币,
中外合作经营企业的外国合作者在合作期限内先行回收投资的法定条件是:() A
当发生重大事故时,事故调查组应当按照国家有关规定开展事故调查,并在()日调查期限
最新回复
(
0
)