本帖最后由 深海鳗鱼 于 2019-4-22 17:27 编辑
从今天开始,常乐将从国外各大网站搬运一些合适K12英语学习者的文章,阅读过程中遇到的问题都可以在大群问常乐。
今天这篇文章讲述的是最近的大热话题,萦绕于耳又万分陌生的外太空神秘客,blackhole黑洞。这篇文章难易程度,适合小五-小六的孩子们,了解该话题的基本概况。
【Science Space】
First Look
April 26, 2019
Rebecca Katzman
OUT OF THE DARKNESS The first image ever created of a black hole was revealed on April 10. NATIONAL SCIENCE FOUNDATION/GETTY IMAGES
The world got a glimpse of one of the greatest mysteries of our universe on April 10. That's when the first image of a black hole was shown to the public. The picture was created by a network of eight radio telescopes on four continents. The network is known as the Event Horizon Telescope. “We have seen what we thought was unseeable,” says Shep Doeleman. He led the effort to create the image. The black hole is at the center of the Messier 87 galaxy, some 55 million light-years from Earth, and is 6.5 billion times the mass of the sun. The image shows the gas, dust, and stars that swirl around the black hole before disappearing into it. This is the “event horizon.” The image does not truly show the black hole, because not even light can escape its gravity. Black holes, like vacuums, suck in everything that gets too close.
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