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
2024-01-30
68
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、They are rocky planets.
B、They are gaseous like Jupiter.
C、They are covered by water.
D、They are covered by sea ice.
答案
A
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3406398.html
相关试题推荐
[originaltext]MostAmericansdon’tliketogetadvicefrommembersoftheir
[originaltext]ThefirstEnglishwindowwasjustanarrowopeninginthewall
[originaltext]ThefirstEnglishwindowwasjustanarrowopeninginthewall
[originaltext]M:IamsorelievedIjustfinishedthestoryIwasworkingonfo
[originaltext]M:IamsorelievedIjustfinishedthestoryIwasworkingonfo
[originaltext]M:Oh,hi,thisbookisduetoday,andIamnotquitefinishedwi
[originaltext]M:Oh,hi,thisbookisduetoday,andIamnotquitefinishedwi
[originaltext]Peoplealwayslookinthemirrorbeforeleavingforworkandf
[originaltext]Peoplealwayslookinthemirrorbeforeleavingforworkandf
[originaltext]Peoplealwayslookinthemirrorbeforeleavingforworkandf
随机试题
WhichofthefollowingbenefitedfromtheAmericancivilrightmovementsinthe
Today,somecriticsarguethatprogressonenvironmentalproblemshasbeene
[originaltext]Moderator:Facedwithawidevarietyofgoodsintheshopping
[originaltext]M:Howdidyourparentsliketheperformancetheyattendedatthe
女,29岁,哺乳期,右乳房肿痛2天,无发热,体检:右乳房肿胀,内象限有压痛,无波
鹏程期货交易所新招了一枇新人,经过公司测试和培训,从中挑选出了一名表现出色的人作
现阶段指导我国证券市场健康发展的八字方针是()。A:公开、公平、公正、守信B:
某企业大批量、单一生产某种产品。该企业为了编制年度生产计划和季度生产计划,进行生
根据公司法律制度的规定,下列情形中,属于股份有限公司可以收购本公司股份的有()
将重组DNA导人宿主细胞所用的方法中不包括A.转导 B.感染 C.转化 D
最新回复
(
0
)