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I would like to visit Jupiter one day,I think it would be a good place to take a vacation, but not on July of 1994. That would have been a terrible time.
In July, 1994, the fragmented comet Shoemaker-Levy 9 that David helped / discover began its fateful final approach to Jupiter.
Instead of being one comet/, it was 20 comets or more, all running down through space, almost like linebackers down a football field. 后卫球员
Each comet collided with Jupiter at the speed of above 140,000 miles an hour.
Telescopes around the world saw radiant plumes1 thrown high into space, leaving dark bruises2 the size of the Earth. Then, in 2009, it happened again.
And this black spot, that is about the size of the Pacific Ocean.
Once again Jupiter’s dual-gravitational role as solar system traffic cop and cosmic Hoover was on display.
Jupiter is the solar system’s vacuum cleaner. Without Jupiter, the Earth will be walloped by a comet, maybe once every 50 years or so. Life would not be possible on the Earth if it were not for Jupiter. We need Jupiter.
For thousands of years, Jupiter has been standing5 guardian6 to life on Earth. And now we think it possibly might have nurtured7 some of its own.
It used to be thought that the chance of meeting alien life on the planets beyond Mars dropped close to absolute zero, much like the temperature. But that was before we knew where to look.
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1 plumes | |
羽毛( plume的名词复数 ); 羽毛饰; 羽毛状物; 升上空中的羽状物 | |
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2 bruises | |
n.瘀伤,伤痕,擦伤( bruise的名词复数 ) | |
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3 astronomer | |
n.天文学家 | |
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4 spotted | |
adj.有斑点的,斑纹的,弄污了的 | |
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5 standing | |
n.持续,地位;adj.永久的,不动的,直立的,不流动的 | |
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6 guardian | |
n.监护人;守卫者,保护者 | |
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7 nurtured | |
养育( nurture的过去式和过去分词 ); 培育; 滋长; 助长 | |
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