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dwell Those two young men dwell on an island and live on fishing. embark Peru embarked on a massive programme of reform. empirical Science studies are empirical researches in most cases. enforcement The new law needs strict enforcement. enthusiastic
Unit 1 Text A Many people often turn a blind eye to the
In March 2000, two astronomers made an extraordinary discovery, one that is set to overturn our understanding of how the universe formed. We're never going to see a time like this in astronomy again.
This ferocious heart of brilliant hot gas is called a quasar. Scientists thought this whirling mass might be caused by a giant black hole sucking up gas and stars, literally feeding on the center of a
When it's feeding, a giant black hole creates a bright burning gas disk around it and then for some reason, it stops feeding, leaving a dark, deadly core lurking menacingly in the center of the galaxy
4. 具体的过程、原理可以略读 CET 考试面向全国各类大学的考生,专业背景各不相同。为了保证考试的公正、公平和权威,在 CET 考试阅读短文中考点一般
Recently, some researchers in Australia were excited about messages from a distant galaxy. But it turns out that the signals were from a completely different source. The scientists at Parkes Observatory in Australia specialize in radio bursts- short
Are you the one The traveler in time who has come To heal my wounds to lead me to the sun To walk this path with me until the end of time Are you the one Who sparkles in the night like fireflies Eternity of evening sky Facing the morning eye to eye A
Here is a computer simulation. 这是计算机模拟。 And we need a way to simplify it. 我们需要简化它的方法。 Well, I like to think about this using an analogy. 我会用一个类比来理解。 If I want to understand the sinking of th
Here is an image. 这是一张照片。 Since galaxy clusters are representative slices of the universe, scaled-down versions. 因为星团可以看做是宇宙的缩小版。 They are mostly made up of dark matter, 它们也是大部分由暗物质构
Todd: Well, what about Area 51? Jonathan: Area 51 i something people always talk about. I'm not really sure what to believe but I essentially think that something's that's a secret that large could never be covered up for such a long period of time.
But that is not the only surprise. People began to realize that these tiny star-like things or they looked like stars are actually putting out as much energy as a hundred of galaxies. And they didnt look like a galaxy at all. The paradox was how some
Still, statistically the probability that there are other thinking beings out there is good. Nobody knows how many stars there are in the Milky Wayestimates range from 100 billion or so to perhaps 400 billionand the Milky Way is just one of 140 billi
I should say that everything is just right so far. In the long term, gravity may turn out to be a little too strong, and one day it may halt the expansion of the universe and bring it collapsing in upon itself, till it crushes itself down into anothe
A new world in your bedroom 卧室里的新天地 Amateur astronomers join the ranks of the planet hunters 业余天文学家加入猎星人行列 IN AN age of professionals, the ability of amateur scientists to make meaningful contributions has almo
Quantum theory is very worthy of regard, he observed politely, but he really didnt like it. God doesnt play dice, he said. Or at least that is how it is nearly always rendered. The actual quote was: It seems hard to sneak a look at Gods cards. But th
Coincidentally, at about the time that Einstein was affixing a cosmological constant to his theory, at the Lowell Observatory in Arizona, an astronomer with the cheerily intergalactic name of Vesto Slipher (who was in fact from Indiana) was taking sp
At least the names for the two main possible culprits are entertaining: they are said to be either WIMPs (for Weakly Interacting Massive Particles, which is to say specks of invisible matter left over from the Big Bang) or MACHOs (for MAssive Compact
This uncertainty applies, incidentally, to relatively nearby things as much as to the distant edges of the universe. As Donald Goldsmith notes, when astronomers say that the galaxy M87 is 60 million light-years away, what they really mean (but do not