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沙发
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发表于 2012-5-2 17:28:31
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只看该作者
2012-05-02
20080101 SSS
This is Scientific American’s sixty seconds(second) science. I'msteven mirky(Steve Mirsky).Got a munite?
Happy New Year!And don’tfeel bad abouttaking today off.After all, you've traveled far. AndI'm not being talk about the trip home from a(the) party last night. According to an essay(NASA), just by being on planet earthin thelast year, you’ve zipped584million miles around the sun to get where you were at a (an average)speed of 67,ooo miles per hour. Again, not taking about your(the)drive home last night.
Of course, the trip was not a perfect circle. As Kepler show (showed),the earth’s orbit is an eclapse(ellipse), with the sun at one or (of) the two fugal (focal) points.He also figured out that the planet goes faster whenit’s at perihelion,the _ is near (nearer)the sun, then_ is for the distance (than it’s at aphelion, its furthest distance), which would explain why summer seems to zip by, except the seasons are afunction of the tilt of the earth’s axis, not its different distances from the sun. And the earth rotates 365 and a quarter times during its sweeparound the sun.The trip takes 8,766 hours or 31,557,600seconds or 5 hundreds 25thousand 9 hundred 60(525,960)minutes,just like this one.
Thanks for the minutes for the scientific American’s sixty seconds(second) science.. i'm steven mirky(Steve Mirsky).
原文:
This is Scientific Americans' 60-Second Science. I am Steve Mirsky. Got a minute?
Happy New Year! And don’t feel bad about taking today off. After all, you’ve traveled far. And I’m not talking about the trip home from the party last night. According to NASA, just by being on the planet earth in the last year, you’ve zipped about 584 million miles around the sun to get back where you were. At an average speed of about 67,000 miles per hour. Again, not talking about the drive home last night.
Of course, the trip was not a perfect circle. As Kepler showed, the earth’s orbit is an ellipse, with the sun at one of the two focal points. He also figured out the planet goes faster when it’s at perihelion, nearer the sun, than when it’s at aphelion, its furthest distance. Which would explain why summer seems to zip by, except the seasons are a function of the tilt of the earth’s axis, not its different distances from the sun. And the earth rotated 365 and a quarter times during its sweep around the sun. The trip took 8,766 hours. Or 31,557,600 seconds. Or 525,960 minutes just like this one.
Thanks for the minute for Scientific Americans' 60-Second Science. I'm Steve Mirsky.
NASA ['næs?] 美国航天航空管理局
zip n.拉链,迅速地移动
ellipse n.椭圆,椭圆形
focal point n.焦点
perihelion [?peri'hi:li?n] n.近日点,最高点
aphelion n.远日点
tilt
the tilt of the earth’s axis n.地轴
sweep
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