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英语听力：自然百科 穿越银河系的旅行 Through Milky Way—31

Our galaxy is rushing toward the great galaxy Andromeda, they are rushing toward each other. And they are going to encounter each other in a couple billion years. Abraham and his colleagues decide to try to simulate this clash of the Titans. This was

发表于:2019-01-22 / 阅读(68) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—30

We've transported the earth 3 billion years into the future. The sky is dominated by a massive galaxy called Andromeda. The view looks peaceful enough. But whats about to happen is one of the greatest calamities in the universe. The clues lie in thes

发表于:2019-01-22 / 阅读(65) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—33

Venus is closer to the Sun, Mars is farther from the Sun. And there is a zone in between, the blazing hot furnace Venus, the frigid Mars. That zone in between we call a habitable zone and the earth lies smack in that thing where water would be in liq

发表于:2019-01-22 / 阅读(54) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—26

So what we are looking at is a region about 200 million light years across which is actually just a small part of our really big simulation that we call Bolshoi which is Russian for big. Everything that you see here is actually completely invisible.

发表于:2019-01-22 / 阅读(79) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—22

All of the galaxies, all of the stars, and gas and dust and planets, and everything else that we can see with our greatest telescopes represent about half of one percent of whats actually/out there. The rest is invisible. It is mostly some mysterious

发表于:2019-01-22 / 阅读(52) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—20

They were once thought to mark the outer limits, but today astronomers believe the Milky Way galaxy is much bigger than what we can see. To understand why, we will travel to the stars of the outer galactic disc. Far from our usual place in space, we

发表于:2019-01-22 / 阅读(56) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—10

To understand how these calamities occur, astronomers need to catch a massive star in its death throes. Astronomers are like detectives. We have to figure out what's going on in the universe, sometimes based on a minimum number of clues. And in the c

发表于:2019-01-22 / 阅读(75) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—11

Once theyve caught the light of a dying star with their state of our telescopes. The detective work can begin. We collect that light and we analyze it in great detail in order to determine whats going on, whats the chemical makeup of the star, whats

发表于:2019-01-22 / 阅读(63) / 评论(0) 分类 自然百科2011年
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