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
67
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 the planets are the same size as Earth.
B、Because the planets are similar in many aspects to Earth.
C、Because the planets are capable of supporting life.
D、Because the planets have water on their surface.
答案
B
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2790131.html
相关试题推荐
[originaltext]W:Hello,thisisMaryspeaking.M:Hi,Mary.ThisisOwen.W:Ah
[originaltext]M:Cindy,whatishappinessinyourmind?W:Whyask?It’sadiff
[originaltext]Windturbinesaretallstructureswithlargebladesusedtop
[originaltext]Windturbinesaretallstructureswithlargebladesusedtop
[originaltext](1)Thepriceofgoldfelltoitslowestlevelinfiveyears
[originaltext](1)Thepriceofgoldfelltoitslowestlevelinfiveyears
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolat
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolat
[originaltext]IhadspentmylastdayinLondonvisitingfriends,takingpi
[originaltext]Passionfruitistheediblefruitofthepassionflower.(16)S
随机试题
Whendoesthefilmend?[originaltext]W:Whendoesthefilmstart,John?M:7:30
(浙江大学2008年试题)Sincetheearly1930s,Swissbankshadpridedthemselvesonth
JazzisAmerica’scontributiontopopularmusic.(1)______classicalmusic,w
[originaltext]M:Mymanagersaidwe’regoingtohavesomelay-offssoon.W:Wil
BydrawingontheWorldBank’sprojectionsofsocioeconomicdevelopmentove
以下情况需要进行数据转换的是( )。A.值缺失 B.数据格式不一致 C.错
为了减轻甲氨蝶呤的毒性反应所用的救援剂是()A.维生素D B.叶酸
某酒店室内消火栓系统的维修保养工作由一家具有相应资质的消防维保单位承担,该消防维
以下关于丙硫氧嘧啶错误的是A.能抑制过氧化酶系统,使碘化物不能氧化成活性碘,酪氨
《环境影响评价法》的立法目的,是为了实施可持续发展战略,促进经济、社会和环境的协
最新回复
(
0
)