单词：event horizon
单词：event horizon 相关文章
By their very definition,black holes are 1) objects which are not supposed to 2) emit anything .It therefore seemed that the area of the 3) event horizon of a black hole could not be regarded as its 4
疯狂英语2002年
These discoveries raised the stakes. Here was a planet similar to our own. Mars might not have cities or civilizations. But it could be home to other smaller life forms like microbes. Chris McKay is N
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I think it is exciting. Because it would imply that if life arose independently on Mars. The implication is that life is pervasive throughout the universe. This is why Mars has so obsessed scientists.
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Rice had seen the same thing in Iceland, one of the few places on Earth with similarities to Mars. It too is extremely cold, and most of the water is frozen into glaciers. And also like Mars, buried u
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For Mars to have rivers, it must once have had streams, rain, clouds and an atmosphere, a planet just like the Earth today-if these were rivers. They had to be sure. The answers would come in 1998 wit
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William Boynton is professor of planetary sciences at the University of Arizona. And he's dedicated his life to looking for water on Mars. The link between life and water is very strong. Even here in
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Hello, Im Callum Robertson and this is Entertainment. th The British sculptor Antony Gormley celebrates his 57 birthday this week. Hes a prolific and popular modern sculptor. One of his most well known pieces is the huge Angel of the North, an enormo
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Black holes got their name because light can't escape them, beyond a certain radiusthe event horizon. But in 1974 Stephen Hawking proposed that quantum effects at the event horizon might cause black holes to benot completely black. Hawking said that
2016年Scientific American(八)月
Of course, any terraforming is still a long way off. The next few expeditions to Mars will definitely be made by machines. NASA, are sending 2 rovers, capable of travelling over 100 meters a day in se
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Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t
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Life on Earth is basically proteins and DNA, so we can wonder if there is life on Mars will also be DNA and proteins, the same type of DNA, the same type of proteins. One might think that DNA is such
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But there was something even better. Odyssey may not just have found ice. There may also be liquid water, and that means, there could be living creatures there too. Right now, there might be liquid wa
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But they never got there. The first disappeared into deep space. Another missed its target when its coordinates were confused. One NASA control center was working in metric, the other in feet and inch
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The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee
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One of these wavelengths corresponds to hydrogen, another wavelength would be iron. Another wavelength would be oxygen. And so you go to the part of the spectrum you are interested in and you see you'
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Hello, I'm Jerry Smit with the BBC News Shares on China's main stock market have fluctuated sharply in the hours of trading since the country's security's regulator lifted the safe mechanism introduced to prevent sharp falls. The market in Shanghai o
中英双语新闻
Theres nothing anywhere near as extreme as a black hole. The disturbing truth about black holes is that there are boundary between the known universe and the place that would forever lie beyond the reach of science. They are in an anomaly of gravity
探索与发现2013年
Alex: Dr. Coopers office. Amy: oh, hello, who are you? Alex: Im Alex, Dr. Coopers assistant. CanI help you? Amy: Id like to speak to Sheldon. Alex: Im sorry. Hes asked me to hold allcalls unless youre Stephen Hawking, his mother or himself from the f
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Callum: Hello, Im Callum Robertson and this is Entertainment. The British sculptor Antony Gormley celebrates his 57th birthday this week. Hes a prolific and popular modern sculptor. One of his most well known pieces is the huge Angel of the North, an
英语听和读
今天我们要学的词是 alternative. Alternative 作为形容词，意思是另外的，可以用于替代的。Stephen Hawking predicts that planet Earth will only survive another 100 years, and it's urgent to consider an alternative planet. 霍金
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