时间:2019-01-08 作者:英语课 分类:Scientific American(五)月


英语课

 This is Scientific Americans 60 second Science, I am Cynthia Graber, This will just take a minute.


 
Scientists are looking for Earth-like planets around other stars. But one way to limit the search can be to figure out where an Earth-like planet cannot exist and eliminate those types of systems.
 
In a new study, astronomers 1 turned their attention to so-called hot Jupiters. These are Jupiter-sized planets that have an orbit of only about three days. The scientists looked at 63 hot Jupiters to see if they could find evidence for any nearby Earth-like planets. They found none.
 
But it could be that the companion planets are too small in size or mass or just aren’t detectable 2 with the current techniques. So the researchers then turned to hot Neptunes, and warm Jupiters—these are Jupiters with slightly longer orbits. They found only 2 potential nearby planets among 222 hot Neptures. And of the 31 warm Jupiters, five showed evidence of a companion. The findings are in the Proceedings 3 of the National Academy of Sciences. 
 
The current theory is that hot Jupiters formed and then migrated in towards their stars. The researchers say that the migration 4 might have “disrupted the formation of Earth-like planets.” Good thing our Jupiter kept its cool.
 
Thanks for the minute for Scientific Americans 60 second Science, I am Cynthia Graber.

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》
adj.可发觉的;可查明的
  • The noise is barely detectable by the human ear.人的耳朵几乎是察觉不到这种噪音的。
  • The inflection point at this PH is barely detectable.在此PH值下,拐点不易发现。
n.进程,过程,议程;诉讼(程序);公报
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
n.迁移,移居,(鸟类等的)迁徙
  • Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
  • He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。
标签: SSS 托福素材
学英语单词
-phasia
advanced rural transportation system
ancillary resources
andrologia
arcus frontalis
bacteriomes
battlestars
betula populifolias
Big, large,
Castiglioncello
CC (channel controller)
chinne
Chlormuron-ethyl
chromospheric bubble
close in for the kill
colloidal graphite for fibre glass
conjunctive proposition
Cruikshank
delete capability
disassure
double heterojunction diode
electronic ceramic device
fat vacuole
follicular hydrops
footpad
formals
fourvey
fruitbat
Fua'amotu
geochemical dispersion
glaucarubin
green water deck wetness
grid plate characteristics
inch-meal
inference procedure
intermediate frequency signal
irregular nature of traffic
jumptv
La Virgen, Cerro
Lagarosolen hispidus
landside slope
lead compensation
lignaloe oil
logic control
logrolling legislation
maunching
mearstone
mincing knife
Mitteleschenbach
mole blade
myrons
narrow-leaved white-topped aster
natural theology
Neonalium
neuroautoimmune
new-land
niche differentiation
No power
occupation forces
octothorpe
out of collar
parthenocarpous fruit
Pedicularis pseudocephalantha
pension program
photoepinasty
polar distribution
Portballintrae
property insured
quasi peak
radiation analyzer
reverse conducting thyristor
Rhogogaster dryas
rubidium indium alum
saouma
Saxifraga aristulata
Simchat Torah
simulation centre
sinusoidal trace
skirt
soil erodibility
sour mushroom
stochastic perturbation
submerged coastal plain
taxed product
telectorate
tephrosia
through phrase
thudding
top-hinged swinging door
truth table reducibility
understudies
UnitName
virtual core
virusin
wavelength plate
wild apples
WILKIE
windowless presenter
withdraw an action
workers' management
working dogs
worth his salt