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
61
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:https://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
依据《公路水运工程试验检测管理办法》的规定,对于换证复核不合格的机构应()
从狭义上讲,风险仅指()。A.盈利发生的不确定性 B.损失发生的不确定性
A.增强补肝肾作用B.增强疗疝止痛作用C.增强滋阴降火作用D.矫味免吐E.增强利
共用题干 甲房地产经纪机构(以下称甲机构)是个人独资的房地产经纪机构。张某和王
A.奎宁B.青蒿素C.伯氨喹D.乙胺嘧啶E.氯喹毒性较大,可引起急性溶血性贫血和
AA BB CC DD
按照艾里克森的发展理论,以建立自我同一性作为主要发展任务的年龄阶段是A.6~12
道路危险货物运输管理的主要内容包括危险货物运输的开业管理、行政许可程序管理和(
甲公司系增值税一般纳税人,下列各项中,应计入进口原材料入账价值的有()。A.进
(2020年真题)下列施工组织设计编制依据中,属于工程文件的是()。A.投标书
最新回复
(
0
)