时间:2019-02-17 作者:英语课 分类:英文语法词汇


英语课

   美国太空总署(NASA)于今日凌晨零时宣布发现首颗太阳系外位于“宜居带”上体积最接近地球大小的行星(代号为“开普勒-452b”),这是人类在寻找太阳系外“第二地球”道路上的重要里程碑。


  请看外媒报道:
  NASA said that its Kepler spacecraft has spotted 1 "Earth's bigger, older cousin": the first nearly Earth-size planet to be found in the habitable zone of a star similar to our own.
  美国太空总署(NASA)宣布,开普勒太空望远镜发现了“地球的大表哥”,这也是首颗在“宜居带”发现的最接近地球大小的行星。
  宜居带
  “宜居带”也叫“适合居住带”,可以用英文habitable zone /Goldilocks zone表示,其实就是指恒星距离适中,水能以液态形式存在、温度适中的区域。habitable 表示“适合居住”的,如适居行星 (habitable planet )。
  NASA发现的这颗系外行星(exoplanet)代号为Kepler-452b,位于距离地球1400光年(14-hundred light-years )的“天鹅座”( constellation 2 Cygnus)方向,体积只比地球大60%,年龄大约在60亿岁,比太阳大15亿岁。NASA宇航员称,这是目前为止他们发现的最接近地球的“孪生星球”(the closest twin to Earth)或者说地球2.0(the Earth 2.0)。
  Kepler-452b像地球一样围绕类太阳恒星(sun-like star)运转,公转周期为385个地球日。该行星可能有适合生命存在的液态水。但目前还没有证据证明该行星存在生命。开普勒太空望远镜于2009年发射升空,旨在收集和传输潜在类地行星(Earth-like planet)的数据。距今为止,“开普勒”已经确认了超过1000颗像地球那样绕恒星运行的行星以及3000余颗候选行星。

adj.有斑点的,斑纹的,弄污了的
  • The milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。
  • Sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。
n.星座n.灿烂的一群
  • 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。
标签: 单词
学英语单词
a skeleton in the cupboard
access intent
AIPC
animal-friendly
auxiliary brake shoe
backes
bend on
bibb lettuces
birkenstock
black decoration on white ground
British gravitational system of unit
brookhaven
Brooksburg
bursal
Cambrians
caoutchouc pelvis
carbon-graphite brush
centre hole lap
coronary artery bypass grafting
cost-benefit study
counter-embattled
cyclis stress
de-stocks
dead tree edition
declimatization
detent eccentric
direction of learning
distance teaching
divorced from
domager
exponential wave
faaan
fasciagram
felling shake
fruit-picker
genus Gloriosa
gradient steepness
ground coat paint
guanosine triphosphate
hematochyluria
highly-paids
hip moulding
Ibangui
ileus verminosus
input immittance of two-port network
instrument of accession
Jasminum wangii
jellet-cornu halfshade
keyter
lake tahoes
lasting quality
magnetization current
maximum measuring depth
medium straw
megaseism
milincic
missouts
modular brick
mohol bushbaby
mowghe
nebulizers
neolan green G
numerical graphic method
nutrient budget
occamist
offset slider crank mechanism
onychogenic substance
orbiteer
outline plan
PAA-CN-CA
pavement marking,road marking
phonematic
photod
primary allometrosis
progonia
pyrenocyte
rear bumper arm
recommended track
roined
rubber boot seal
sales cycle
screw tip
seasonal forecasting
self-making
semiartinian
Sigma welding
Sloviansk
super bantamweight
supplementary judgment
tang
threshing time
to see me
tospovirus capsicum chlorosis virus
track division
Tunisianize
twenty-four
twilight shift
tyre side slip
Vapikhamthong, Khouèng
vibratory auscultation
Vorozhba
water cellar