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
30
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/3406397.html
相关试题推荐
AstrologyA)Astrologyisthestudyofhowthesun,themoon,planets,a
AstrologyA)Astrologyisthestudyofhowthesun,themoon,planets,a
AstrologyA)Astrologyisthestudyofhowthesun,themoon,planets,a
AstrologyA)Astrologyisthestudyofhowthesun,themoon,planets,a
[originaltext](22)Californiaisinthemidstoftheworstdroughtonrecor
[originaltext](22)Californiaisinthemidstoftheworstdroughtonrecor
[originaltext](22)Californiaisinthemidstoftheworstdroughtonrecor
[originaltext]Considerthefactthatcropsgenerallyproduceseveralhundre
[originaltext]Considerthefactthatcropsgenerallyproduceseveralhundre
[originaltext]Thisletterishandwritten,anditisbyasurvivoroftheTi
随机试题
WriteNOMORETHANTWOWORDSAND/ORANUMBERforeachanswer.Address:
1.题目:语音连读 2.内容: Look_attheone_onthe
A.发电鞋工作时将电能转化为机械能 B.发电鞋是利用电磁感应原理工作的 C.
PPP是连接广域网的一种封装协议,下面关于PPP的描述中错误的是()A.能
B公司股票,本年的股利为2.8元,预计股利的增长率为0,已知无风险利率为5%,股
女性,45岁,头部外伤3小时,伤后立即昏迷,查中度昏迷,右瞳散大,光反射消失,左
首选的煎药器具是A.铜器B.铁器C.银器D.玻璃制器E.陶瓷制器
晓甜上课经常开小差,有时还不交作业。乔老师发现她喜欢写作,就经常在班上表扬她作文
现代企业制度的核心是()。A.企业产权制度 B.有限责任制度 C.现代公司
下列哪些因子参与蛋白质翻译延长?( )A.IF B.EF-G C.EF-T
最新回复
(
0
)