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CNN News:小行星2018VP1撞击地球几率极低 NASA从本努小行星采样

Source: 恒星英语学习网    2020-11-20   English BBS   Favorite  

What or who is 2018 VP One? An asteroid, a comet, Mike Pence, or the first "Masked Singer". It's a bird, it's a plane? No, it's an asteroid that's headed toward Earth as you watch this show.
And it could hit the Earth one day before the U.S. election but it probably won't. Scientists have known about this asteroid since 2018. It's about the size of a refrigerator and they say there's a chance of 1 in 240 that it will enter Earth's atmosphere in November 2nd.
But even if 2018 VP One is on a path to do that, astronomers say it will disintegrate and burn up in our atmosphere before it hits the ground beneath our feet. Many of them are far more interested in another asteroid named Bennu.

NASA has a $1.16 billion mission in which a spacecraft is going to try to touch down on Bennu, collect a sample of its surface and bring it back home to Earth in 2023. It's taking so long because the asteroid and the spacecraft are 200 million miles from Earth. But if it works, it will be the first time a sample from a rock in space is brought back to our planet. NASA should know by Tuesday if the sample collection successfully took place.


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