情景对话: Does he really live up there? I took basic astronomy and there was no mention of life, or children, on any other planets. Unless it's true that he came from a star, but that seems improbable. 知识点讲解: There was no mention of

发表于:2018-12-01 / 阅读(327) / 评论(0) 分类 2018年VOA慢速英语(一)月

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(68) / 评论(0) 分类 自然百科2011年

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(83) / 评论(0) 分类 自然百科2011年

What happens is that, first the dark matter forms the structure, the ordinary matter then follows the dark matter. The ordinary matter is hydrogen and helium at this stage. And the hydrogen and helium fall/ to the center of the dark matter halos that

发表于:2019-01-22 / 阅读(59) / 评论(0) 分类 自然百科2011年

The Lowest Note in the Universe 宇宙中的最低音 It's coming from a black hole in the Perseus Cluster, about two hundred fifty million light years away. A black hole?And outer space?That makes sound? Whats happening out there is that interga

发表于:2019-02-16 / 阅读(53) / 评论(0) 分类 英语听力文摘 English Digest

Better Than Barney 某天夜里,你一觉醒来发现电视机忘了关,节目却已播完,电视屏幕上嘶嘶地闪着雪花,也许你不会想到,再普通不过的雪花噪音竟包含来自137亿年前宇宙大爆炸的遗物微波背景

发表于:2019-03-09 / 阅读(215) / 评论(0) 分类 英语听力文摘 English Digest