美宇航局:99942小行星10年内将飞过地球
文章来源:未知 文章作者:enread 发布时间:2019-05-06 09:22 字体: [ ]  进入论坛
(单词翻译:双击或拖选)
An asteroid1 named 99942 Apophis will fly towards the Earth in ten years, the U.S. space agency NASA said recently.
 
美国宇航局最近表示,一颗名为99942阿波菲斯的小行星将于10年内飞向地球。
 
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.


点击收听单词发音收听单词发音  

1 asteroid uo1yD     
n.小行星;海盘车(动物)
参考例句:
  • Astronomers have yet to witness an asteroid impact with another planet.天文学家还没有目击过小行星撞击其它行星。
  • 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,但这样的危险还是存在的。
2 colossal sbwyJ     
adj.异常的,庞大的
参考例句:
  • There has been a colossal waste of public money.一直存在巨大的公款浪费。
  • Some of the tall buildings in that city are colossal.那座城市里的一些高层建筑很庞大。
3 chaos 7bZyz     
n.混乱,无秩序
参考例句:
  • After the failure of electricity supply the city was in chaos.停电后,城市一片混乱。
  • The typhoon left chaos behind it.台风后一片混乱。
4 relatively bkqzS3     
adv.比较...地,相对地
参考例句:
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
5 radar kTUxx     
n.雷达,无线电探测器
参考例句:
  • They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
  • Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。
6 astronomers 569155f16962e086bd7de77deceefcbd     
n.天文学者,天文学家( astronomer的名词复数 )
参考例句:
  • Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
  • Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪,为什么只有土星有光环。 来自《简明英汉词典》
7 trajectory fJ1z1     
n.弹道,轨道
参考例句:
  • It is not difficult to sketch the subsequent trajectory.很容易描绘出它们最终的轨迹。
  • The path followed by a projectile is called its trajectory.抛物体所循的路径称为它的轨道。
TAG标签: asteroid earth Nasa
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
验证码:点击我更换图片