时间:2019-01-22 作者:英语课 分类:自然百科2010年


英语课

 Are we alone ?And it ties into all the big questions: how do we get here ? where are we going ?Are we a part of a bigger picture?


 
But for the longest time ,the question was  taboo to science .
 
Before the Mid-1990s ,it was considered somewhat embarassing to even address the question, because looking for alien life seems a little frighteningly close to science fiction .
 
For decades ,the farthest we got in looking for aliens was imagining them on the silver screen .(What is your name?) After all , alien life needs a hull 1, and we havn't even find a planet outside our own solar system .
 
Scientists in fact never talked about planets around other stars. There is no way to detect them. And so it was one of those domains 2 of science that you couldn't answer and therefore you didn't talk about it.
 
Then in 1995, astronomers 3 discovered a planet orbiting a star 50 light-years from earth. And since then they found hundreds more .
 
For the first time, in human history ,we realized that our sun with its 8 major planets that go around it, is just one type of a planetary system ,one example of billlions.
 
These discoveries are exciting ,but don't expect to dial up ET on these planets anytime soon .
 
Well ,it's been a spectacular ride in the last decade to find these planets ,most of them are giant planets.
 
Most of the worlds we found are gas giants which probably couldn't support life .
 
You can't stand on pneumas ,no hard surface,they are large balls of hydrogen and helium gas like Jupiter and Saturn 4 .
 
We have found a few rocky planets with hard surfaces ,but they are many times more massive than earth ,and contain the most hostile environments you could ever imagine. One such planet, CoRoT-7b,orbits so close to its star that / surface temperatures reach as high as 3000 degrees .Sunlights here does not bring the sound of birds' song ,instead it's an Armageddon of volcanic 5 explosions .

n.船身;(果、实等的)外壳;vt.去(谷物等)壳
  • The outer surface of ship's hull is very hard.船体的外表面非常坚硬。
  • The boat's hull has been staved in by the tremendous seas.小船壳让巨浪打穿了。
n.范围( domain的名词复数 );领域;版图;地产
  • The theory of thermodynamics links the macroscopic and submicroscopic domains. 热力学把宏观世界同亚微观世界联系起来。 来自辞典例句
  • All three flow domains are indicated by shading. 所有三个流动区域都是用阴影部分表示的。 来自辞典例句
n.天文学者,天文学家( astronomer的名词复数 )
  • Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
  • Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪,为什么只有土星有光环。 来自《简明英汉词典》
n.农神,土星
  • Astronomers used to ask why only Saturn has rings.天文学家们过去一直感到奇怪,为什么只有土星有光环。
  • These comparisons suggested that Saturn is made of lighter materials.这些比较告诉我们,土星由较轻的物质构成。
adj.火山的;象火山的;由火山引起的
  • There have been several volcanic eruptions this year.今年火山爆发了好几次。
  • Volcanic activity has created thermal springs and boiling mud pools.火山活动产生了温泉和沸腾的泥浆池。
学英语单词
acceleration test
acephobia
agig
air space
alloxazin
alpha glucosidase
antenna lobe
antirailroad
Azerraf
barbatinic acid
Baryshnikov
bidding rules
Bisongu, L.
bladerunner
C Language standard
cabinet latch
california-berkeley
carminophil cell
chacarero
chiasma frequency
chinese lesser civet
chory
circuit bridge
clustered aggregate
coila
constraint domain
contextualizations
descant recorder
direct-sum topological space
divellicated
drytte
easy as winking
electromagnetic seed cleaner
engine generators
forge fan
foul fish
generic attribute
geo-stationary orbit
good old dayss
hemp family
hide up
hiller
impactings
Institute of Navigation and Electronic Engineering
interest on current debt
iodine nuclide composition
irritable uterus
Kakindu
kampots
koettite
laminae cribrosa
laying in
leptostracans
lithosis
logical subnet
luragoes
magical realism
Minkowski coordinate system
noil yarn
non-participating
non-segregated
Norepirenamine
norflexes
notching relay
nystafungin
Phacelocarpus
plenicorn
precipitation particle
protopathic sensation
pseudocyclopiid
purple sandpiper
quench tower
Radauti
rate of occurrence of closing without proper command
recalculable
ring sticking test
rudderhole
Rule of Employment of Seamen
salming
saponated cresol
scriabins
self inflation
send date
shoka
short closing
single velocity stage
Strausstown
Streptococcus meningitidis
subvertising
sulphur hexafluoride
tamasi
tantalum sheet
Tensinyl
Terakeka
tetes-de-pont
trcrine
Trimethyl-1-pentene
wave-particle duality
wear mechanism
wet film hanger
write font