美宇航局:99942小行星10年內將飛過地球
文章來源:未知 文章作者:enread 發布時間:2019-05-06 09:22 字體: [ ]  進入論壇
(單詞翻譯:雙擊或拖選)
An asteroid1 named 99942 Apophis will fly towards the Earth in ten years, the U.S. space agency NASA said recently.
 
美國宇航局最近表示,一顆名為99942阿波菲斯的小行星將于10年內飛向地球。
 
The colossal2 asteroid, which named after the Egyptian god of chaos3 and destruction, is expected to approach the Earth dangerously close on April 13, 2029, according to the latest data from NASA.
 
But there is no need to worry as it will be about 19,000 miles (31,000 km) away from the surface of the Earth.
 
NASA said it's relatively4 rare for such a large object to pass so close to Earth and it will be a great opportunity for asteroid scientists around the world to conduct a close-up study of the Apophis' size, shape, composition and possibly even its interior.
 
"The Apophis close approach in 2029 will be an incredible opportunity for science," Marina Brozovic, a radar5 scientist at NASA's Jet Propulsion Laboratory in Pasadena, California, said in a NASA release.
 
"We'll observe the asteroid with both optical and radar telescopes. With radar observations, we might be able to see surface details that are only a few meters in size," Brozovic said.
 
Apophis was discovered in 2004 by the U.S. astronomers6. Since its discovery, optical and radar telescopes have tracked Apophis as it continues on its orbit around the Sun, so scientists know well its future trajectory7.
 
Current calculations show that Apophis still has a small chance of impacting Earth, NASA said.


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1 asteroid uo1yD     
n.小行星;海盤車(動物)
參考例句:
  • Astronomers have yet to witness an asteroid impact with another planet.天文學家還沒有目擊過小行星撞擊其它行星。
  • It's very unlikely that an asteroid will crash into Earth but the danger exists.小行星撞地球的可能性很小,但這樣的危險還是存在的。
2 colossal sbwyJ     
adj.異常的,龐大的
參考例句:
  • There has been a colossal waste of public money.一直存在巨大的公款浪費。
  • Some of the tall buildings in that city are colossal.那座城市里的一些高層建筑很龐大。
3 chaos 7bZyz     
n.混亂,無秩序
參考例句:
  • After the failure of electricity supply the city was in chaos.停電后,城市一片混亂。
  • The typhoon left chaos behind it.臺風后一片混亂。
4 relatively bkqzS3     
adv.比較...地,相對地
參考例句:
  • The rabbit is a relatively recent introduction in Australia.兔子是相對較新引入澳大利亞的物種。
  • The operation was relatively painless.手術相對來說不痛。
5 radar kTUxx     
n.雷達,無線電探測器
參考例句:
  • They are following the flight of an aircraft by radar.他們正在用雷達追蹤一架飛機的飛行。
  • Enemy ships were detected on the radar.敵艦的影像已顯現在雷達上。
6 astronomers 569155f16962e086bd7de77deceefcbd     
n.天文學者,天文學家( astronomer的名詞復數 )
參考例句:
  • Astronomers can accurately foretell the date,time,and length of future eclipses. 天文學家能精確地預告未來日食月食的日期、時刻和時長。 來自《簡明英漢詞典》
  • Astronomers used to ask why only Saturn has rings. 天文學家們過去一直感到奇怪,為什么只有土星有光環。 來自《簡明英漢詞典》
7 trajectory fJ1z1     
n.彈道,軌道
參考例句:
  • It is not difficult to sketch the subsequent trajectory.很容易描繪出它們最終的軌跡。
  • The path followed by a projectile is called its trajectory.拋物體所循的路徑稱為它的軌道。
TAG標簽: asteroid earth Nasa
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