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(单词翻译)
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 galaxy1 but got too close to the giant black hole at the center. The hole swallowed one of those stars and hurled2 away the other two. Those two careening stars merged3 to form one super-hot, incredibly fast-moving blue star, which is now on the very outskirts4 of the Milky5 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 momentum6 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
1 galaxy | |
n.星系;银河系;一群(杰出或著名的人物) | |
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2 hurled | |
v.猛投,用力掷( hurl的过去式和过去分词 );大声叫骂 | |
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3 merged | |
(使)混合( merge的过去式和过去分词 ); 相融; 融入; 渐渐消失在某物中 | |
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4 outskirts | |
n.郊外,郊区 | |
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5 milky | |
adj.牛奶的,多奶的;乳白色的 | |
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6 momentum | |
n.动力,冲力,势头;动量 | |
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