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 arrival factor
Adair, John
Amoeba tetragena
animes
anterior iliac artery
Anthony Powell
athabascaite
Austronesianist
band saw blade tensioner
bioreacter
bloater
botryogenite
bovine serum
bridgeplates
broodstocks
buy secondary hand
careless of
cheetahs
colubrinol
compass in binnacle
conditional information
conforaneous
county agents
crew stairs
Cumulative Return
deaerator adjustment test
decimetric feeder
deoxyribonucleic protein
dermochrome
diabetic neuropathy
dome kiln
education received
elevating gear
enthalpy flux
externally mounted mechanical seal
fade-out
field pick up
field replacement unit
Forlandsundet
get into a temper
goings-on
gyroes
h(a)ematology
hits on me
huytons
insculptor
interior fittings
iodoform albuminate
iron wire brush
iron-bound
jadder
khazei
land storage
layered network
line transect method
logarithmic temperature scale
low temperature dry cell
make an attack upon
markois
matching quadrupole
maximum traverse of boring spindle
Mesolithic Period
meteorological diversity scenery
microcivilizations
microetch
minuteman
mismeter
montpellier codex
multistage stratified random sampling
multitrack error
Neofiber alleni
new management
Nimrah
nonlinear damper
Old World jay
pack duck
peace-keeping force
phakotoxic
plitch
power range channel
precancerous leukokeratosis
put up the cards against someone
rack shaping machine
resoliving power test target
retrotrans-position
senior debt
shielded ball bearing
sliding wheel shaft
superpeople
Three Estates (of the Realm)
TKing
toit
tool sharpener
totalling meter
turning sander
unpopped
unsupported barrel
viuras
wakeboarder
water level fluctuations
WSHF
Zeiss orthometer lens