太阳系外发现一颗可能有生命的超级地球
文章来源:未知 文章作者:enread 发布时间:2017-05-06 01:12 字体: [ ]  进入论坛
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Point a high-powered telescope at the constellation1 Cetus, the sea monster, and it is just possible to make out a dim red dwarf2 star shining in the tail. 
 
使用高倍率望远镜观察鲸鱼座(Ceuts,名为海怪),也只能勉强看到星座尾部有一颗昏暗的红矮星在发光。
 
Although it might seem unspectacular, orbiting around that star is a rocky planet that could hold the answer to whether we are alone in the universe. 
 
Scientists say the planet is a 'Super-Earth' which is the best place to look for signs of life outside of the Solar System. 
 
Early indications suggest it has an atmosphere, and sits within the 'Goldilocks Zone' where it is neither too hot nor too cold for liquid water to exist. 
 
And it is only 40 light years from Earth meaning that it could be possible to send a signal. 
 
"This is the most exciting exoplanet I've seen in the past decade," said lead author Jason Dittmann of the Harvard-Smithsonian Center for Astrophysics. 
 
"We could hardly hope for a better target to perform one of the biggest quests in science -- searching for evidence of life beyond Earth."
 
The planet was found by an international team of scientists who have been studying data from European Space Observatory3’s High Accuracy Radial velocity4 Planet Searcher (HARPS) instrument which looks for regular changes in brightness of stars, which suggests a planet is passing by in orbit. 
 
The new world - dubbed5 LHS 1140b - is ten times closer to its parent star than Earth but because a red dwarf is far cooler than our own yellow dwarf, the planet still sits in the habitable zone. 
 
"The present conditions of the red dwarf are particularly favourable6 -- LHS 1140b spins more slowly and emits less high-energy radiation than other similar low-mass stars," added team member Nicola Astudillo-Defru from Geneva Observatory, Switzerland.


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1 constellation CptzI     
n.星座n.灿烂的一群
参考例句:
  • A constellation is a pattern of stars as seen from the earth. 一个星座只是从地球上看到的某些恒星的一种样子。
  • The Big Dipper is not by itself a constellation. 北斗七星本身不是一个星座。
2 dwarf EkjzH     
n.矮子,侏儒,矮小的动植物;vt.使…矮小
参考例句:
  • The dwarf's long arms were not proportional to his height.那侏儒的长臂与他的身高不成比例。
  • The dwarf shrugged his shoulders and shook his head. 矮子耸耸肩膀,摇摇头。
3 observatory hRgzP     
n.天文台,气象台,瞭望台,观测台
参考例句:
  • Guy's house was close to the observatory.盖伊的房子离天文台很近。
  • Officials from Greenwich Observatory have the clock checked twice a day.格林威治天文台的职员们每天对大钟检查两次。
4 velocity rLYzx     
n.速度,速率
参考例句:
  • Einstein's theory links energy with mass and velocity of light.爱因斯坦的理论把能量同质量和光速联系起来。
  • The velocity of light is about 300000 kilometres per second.光速约为每秒300000公里。
5 dubbed dubbed     
v.给…起绰号( dub的过去式和过去分词 );把…称为;配音;复制
参考例句:
  • Mathematics was once dubbed the handmaiden of the sciences. 数学曾一度被视为各门科学的基础。
  • Is the movie dubbed or does it have subtitles? 这部电影是配音的还是打字幕的? 来自《简明英汉词典》
6 favourable favourable     
adj.赞成的,称赞的,有利的,良好的,顺利的
参考例句:
  • The company will lend you money on very favourable terms.这家公司将以非常优惠的条件借钱给你。
  • We found that most people are favourable to the idea.我们发现大多数人同意这个意见。
TAG标签: earth dwarf star
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