英语听力 学英语,练听力,上听力课堂! 注册 登录
> 在线听力 > 英语高级听力 > 探索频道 宇宙的边疆 >  第6篇

探索频道 Cosmos 宇宙的边疆06

所属教程:探索频道 宇宙的边疆

浏览:

手机版
扫描二维码方便学习和分享
https://online2.tingclass.net/lesson/shi0529/0008/8584/27.mp3
https://image.tingclass.net/statics/js/2012

Among the many glowing clouds of interstellar gas is one called the Orion Nebula, only 1500 light years from Earth.

These three bright stars are seen by earthlings as the belt in the familiar constellation of Orion, the Hunter.

The nebula appears from Earth as a patch of light, the middle star in Orion's sword. But it is not a star, it is another thing entirely, a cloud that veils one of nature's secret places.

This is a stellar nursery, a place where stars are born. They condense by gravity from gas and dust until their temperatures become so high that they begin to shine. Such clouds mark the births of stars as others bear witness to their deaths.

And after stars condense in the hidden interiors of interstellar clouds, what happens to them? The Pleiades are a loose cluster of young stars only 50 million years old. These fledgling stars are just being let out into the galaxy. Still surrounded by wisps of nebulosity, the gas and dust from which they formed.

There are clouds that hang like inkblots between the stars. They are made of fine rocky dust, organic matter and ice. Inside, a few stars begin to turn on, nearby worlds of ice evaporate and form long comet-like tails driven back by the stellar winds.

Black clouds, light years across, drift between the stars. They are filled with organic molecules. The building blocks of life are everywhere. They are easily made. On how many worlds have such complex molecules assembled themselves into patterns we would call "alive"?

Most stars belong to systems of two or three or many suns, bound together by gravity. Each system is isolated from its neighbors by the light years. We are approaching a single ordinary yellow dwarf star surrounded by a system of nine planets, dozens ……

用户搜索

疯狂英语 英语语法 新概念英语 走遍美国 四级听力 英语音标 英语入门 发音 美语 四级 新东方 七年级 赖世雄 zero是什么意思临沂市董家朱许小区阁楼英语学习交流群

网站推荐

英语翻译英语应急口语8000句听歌学英语英语学习方法

  • 频道推荐
  • |
  • 全站推荐
  • 推荐下载
  • 网站推荐