At some point in the future, Earth is going to end up in the crosshairs of an asteroid that's big enough to be a threat. Whether it's a 'planet-killer' or a 'city-killer', we need to know about these asteroids, and we need to have a plan in...
They predicted(预测) it could hit our planetin 2029. They later changed this to 2068. Howevertheir latest prediction is that Earth will be safe fromApophis for the next 100 years.The scientists used radar(雷达)to predictthe asteroid's orbit(轨道) around the sun. NASAscientist Marina Brozovic...
An asteroid NASA's been tracking for nearly 25 years could impact Earth in the future, a new report reveals. First discovered in 1999, Bennu, the near-Earth asteroid, could possibly drift into the planet's orbit and could hit the planet by September 2182, according to the OSIRIS-REx ...
A test to protect Earth from asteroids unleashed a swarm of boulders—and a new study suggests that there may be some unintended consequences.
Szokan, Nancy
NASA delivers bounty of asteroid samples to Earth Most of the small asteroids that enter Earth's atmosphere end their plunge in screaming, fiery violence. But on 24 September, after detaching from NASA's OSIRIS-REx spacecraft, a capsule carrying asteroid samples descended gently by para... P ...
C.They were formed earlier than Earth.D.NASA's Double Asteroid Redirection Test failed. 答案(1)段落大意题。根据文章第一段By visiting these near Earth objects to study the material that came from the solar nebula,we can look for answers to some of humankind's most arresting...
In all likelihood, asteroid 2024 YR4 will slip silently past the Earth. Based on the data we have so far, there’s an estimated chance of only 2.1% to 2.3% that it will collide with the planet on December 22nd, 2032. Under normal circumstances, if somebody told you there was a roughl...
(小行星) 11.3 million kilometers away, changing the asteroid's orbit and lowered its cycle period by15 minutes, the space organization announced on Monday.Some said the move shows the world might now be able to prevent asteroids-the kind that made the dinosaurs extinct-from hitting the Earth...
据美国有线电视新闻网(CNN)报道,美国国家航空航天局(NASA)喷气推 进实验室近地天体研究中心近日表示,一颗名为“2024 YR4”的小行星,有2%的概率将在2032年撞上地球。 A recently discovered asteroid, named 2024 YR4, has on average a 2% chance of hitting Earth in 2032. ...