SSS 2010-07-23
时间：2018-12-24 作者：英语课 分类：Scientific American(七)月
Here’s what scientists think happened, oh, about a hundred million years ago. There was this three-star system. The three linked stars were strolling through the galaxy 1 but got too close to the giant black hole at the center. The hole swallowed one of those stars and hurled 2 away the other two. Those two careening stars merged 3 to form one super-hot, incredibly fast-moving blue star, which is now on the very outskirts 4 of the Milky 5 Way.
And here’s how scientists came up with that dramatic tale, which they just published in Astrophysical Journal Letters.
They discovered what they call a hypervelocity star, which moves three times faster than our sun does through the galaxy. According to new information provided by the Hubble telescope, the star originated deep within the Milky Way.
The scientists used the Hubble to figure out the direction of the star’s travels and the distance from the galactic center, along with the star’s mass, age and speed. Its unusual attributes give rise to the idea that one star was swallowed and transferred its momentum 6 to the other two, which transformed into a blue superstar. Hurtling through the galaxy, faster than a speeding sun.
Thanks for the minute for Scientific American’s 60-Second Science. I’m Cynthia Graber
- The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
- The company has a galaxy of talent.该公司拥有一批优秀的人才。
- He hurled a brick through the window. 他往窗户里扔了块砖。
- The strong wind hurled down bits of the roof. 大风把屋顶的瓦片刮了下来。 来自《简明英汉词典》
- Turf wars are inevitable when two departments are merged. 两个部门合并时总免不了争争权限。
- The small shops were merged into a large market. 那些小商店合并成为一个大商场。
- Our car broke down on the outskirts of the city.我们的汽车在市郊出了故障。
- They mostly live on the outskirts of a town.他们大多住在近郊。