标签:宇宙新领域 相关文章
The Color Of The Universe 宇宙的颜色 When we look up into the night sky it seems black, but scientists have observed something different. In this Moment of Science we discuss the color of the universe. 当我们仰望夜空的时候,它看上去
Although everyone calls it the Big Bang, many books caution us not to think of it as an explosion in the conventional sense. It was, rather, a vast, sudden expansion on a whopping scale. So what caused it? 虽然人人都称其为大爆炸,但许多书
In either case, get ready for a really big bang. 无论哪种情况,准备好来一次真正的大爆炸。 Naturally, you will wish to retire to a safe place to observe the spectacle. 很自然,你希望退避到一个安全的地方来观察这个
It was he who coined the term Big Bang, in a moment of facetiousness, for a radio broadcast in 1952. He pointed out that nothing in our understanding of physics could account for why everything, gathered to a point, would suddenly and dramatically be
The reason we can be reasonably confident that such an event won't happen in our corner of the galaxy, Thorstensen said, is that it takes a particular kind of star to make a supernova in the first place. 索尔斯坦森说,有理由相信,这种事
Interestingly, Zwicky had almost no understanding of why any of this would happen. According to Thorne, he did not understand the laws of physics well enough to be able to substantiate his ideas. Zwicky's talent was for big ideas. OthersBaade mostlyw
What is extraordinary from our point of view is how well it turned out for us. If the universe had formed just a tiny bit differentlyif gravity were fractionally stronger or weaker, if the expansion had proceeded just a little more slowly or swiftlyt
Martin Rees, Britain's astronomer royal, believes that there are many universes, possibly an infinite number, each with different attributes, in different combinations, and that we simply live in one that combines things in the way that allows us to
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
The analogy that is usually given for explaining the curvature of space is to try to imagine someone from a universe of flat surfaces, who had never seen a sphere, being brought to Earth. No matter how far he roamed across the planet's surface, he wo
Science and technology 科学技术 Table-top astrophysics 桌面上的天体物理学 How to build a multiverse 怎样构建多元宇宙 Small models of cosmic phenomena are shedding light on the real thing 微小模型逐步揭开宇宙中各种现象
Science and technology 科学技术 Table-top astrophysics 桌面上的天体物理学 How to build a multiverse 怎样建立一个多元宇宙 Small models of cosmic phenomena are shedding light on the real thing 宇宙现象的一些小模型反映了
Science and technology 科学技术 Astronomy 天文学 The cosmic boogie-box 宇宙中的摇滚乐 The sky, it seems, is filled with unexpected radio signals 看上去,太空中充满了我们意想不到的无线电讯号 WHISPER it not, but doin
讲师: 肖恩卡罗尔 字幕:中英双文 授课语言:英文 在TEDx加州理工学院,宇宙学家肖恩卡罗尔把我们带入一段娱乐性强且发人深省的,穿梭于时间与宇宙之间的旅程,目的是探究一个貌似简单
Every object that has mass creates a little depression in the fabric of the cosmos. 凡有质量的物体在宇宙的底垫上都能造成一个小小的凹坑。 Thus the universe, as Dennis Overbye has put it, is the ultimate sagging mattress. 因此
We now know that Cepheids throb as they do because they are elderly stars that have moved past their main sequence phase, in the parlance of astronomers, and become red giants. The chemistry of red giants is a little weighty for our purposes here (it
Leaders 社论 Cosmology 宇宙学 Man suddenly sees the start of the universe 揭秘宇宙的起源 The quest to understand reality takes a great leap backwards 科学新突破探索宇宙诞生之初的真相 IN THE beginning was the word and the w
Combining Leavitt's cosmic yardstick with Vesto Slipher's handy red shifts, Edwin Hubble now began to measure selected points in space with a fresh eye. In 1923 he showed that a puff of distant gossamer in the Andromeda constellation known as M31 was
This was truly startling. The universe was expanding, swiftly and evenly in all directions. It didn't take a huge amount of imagination to read backwards from this and realize that it must therefore have started from some central point. Far from bein