首页
登录
职称英语
[originaltext] Astronomers have found at least seven Earth-sized planets orb
[originaltext] Astronomers have found at least seven Earth-sized planets orb
游客
2023-06-28
25
管理
问题
Astronomers have found at least seven Earth-sized planets orbiting the same star 40 light-years away, according to a study published Wednesday in the journal Nature. The findings were also announced at a news conference at NASA headquarters in Washington. (16) This discovery outside of our solar system is rare because the planets have the winning combination of being similar in size to Earth and being all temperate, meaning they could have water on their surface and potentially support life.
"This is the first time that so many planets of this kind are found around the same star," said Michael Gillon, lead study author and astronomer at the University of Liege in Belgium.
The seven exoplanets were all found in tight formation around an ultra-cool dwarf star called TRAPPIST-1. (17) Estimates of their mass also indicate that they are rocky planets, rather than being gaseous like Jupiter. Three planets are in the habitable zone of the star, known as TRAPPIST-1 e, f and g, and may even have oceans on the surface.
(18) The researchers believe that TRAPPIST-lf in particular is the best candidate for supporting life. It’s a bit cooler than Earth, but could be suitable with the right atmosphere and enough greenhouse gases.
"I think we’ve made a crucial step towards finding if there is life out there," said Amaury Triaud, one of the study authors and an astronomer at the University of Cambridge. "I don’t think any time before we had the right planets to discover and find out if there was life. Here, if life managed to thrive and releases gases similar to what we have on Earth, we will know."
Questions 16 to 18 are based on the passage you have just heard.
16. Why is the discovery outside of our solar system rare?
17. What do estimates of the mass of the seven exoplanets indicate?
18. Why do researchers think that TRAPPIST-1f is the most suitable for life?
选项
A、Because it has the right temperature and enough greenhouse gases.
B、Because it has the right amount of water and enough greenhouse gases.
C、Because it has the right atmosphere and enough greenhouse gases.
D、Because it has the right gravity and enough greenhouse gases.
答案
C
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/2790133.html
相关试题推荐
[originaltext]HettyGreenwasaveryspoilt,onlychild.ShewasborninMa
[originaltext]HettyGreenwasaveryspoilt,onlychild.ShewasborninMa
[originaltext]HettyGreenwasaveryspoilt,onlychild.ShewasborninMa
[originaltext]HettyGreenwasaveryspoilt,onlychild.ShewasborninMa
[originaltext]Thetopicofmytalktodayisgift-giving.Everbodylikesto
[originaltext]Intoday’sclass,we’lldiscussToniMorrison’snovelBeloved
[originaltext]Intoday’sclass,we’lldiscussToniMorrison’snovelBeloved
[originaltext]M:You’regoingtowearoutthecomputer’skeyboard!W:Oh,hi.M
[originaltext]W:Morning,thisisTGC.M:Goodmorning.WalterBarryhere,call
[originaltext]W:Morning,thisisTGC.M:Goodmorning.WalterBarryhere,call
随机试题
Itisimportant______(每个学生都要理解校规).everypupil(should)beabletounderstandthe
甲公司在2017年10月18日申请注册“婴宝”商标。2018年5月10日该商标被
渗沟按排水层的构造形式可分为盲沟、管式渗沟和()。A.明沟 B.暗沟 C.渗
关于双膦酸盐的使用,正确的为()A:应于早晨空腹给药,用足量水送服 B:低钙
《中华人民共和国刑法》规定销售明知是不符合保障人体健康的国家标准、行业标准的医疗
太平天国前期,英国代表声称:英国“绝不左袒中国政府”,表示要恪守“中立”,同时把
一个数列为1,-1,2,-2,-1,1,-2,2,1,-1,2,-2…….则该
①所以,现在除了传统哲学,教育、法律等学科也纷纷从哲学层面进行研究思考,显示了哲
鉴于总账及其所属明细账相互关系,在进行账簿登记时应采用( )。A.复式记账法
夫妻和未婚子女组成的家庭属于()。 (A)主干家庭(B)核心家庭 (C)
最新回复
(
0
)