NASA's plan to save Earth from a giant asteroid
发布时间 2017-12-08 13:01:11 来源
摘要
Don’t panic.
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65 million years ago, a large asteroid collided with Earth near present-day Chicxulub, Mexico. The impact was a climactic event that likely contributed to dinosaur extinction. Today, Earth remains vulnerable to asteroid collisions. In recent history, space rocks have landed in The United States, Russia, and elsewhere. In the event of a potential asteroid collision, NASA has developed several options for dealing with the threat. Researchers at NASA’s Center for Near Earth Object Studies and Jet Propulsion Laboratory have proposed using blunt force, weaponized deflection or a theoretical tool called a gravity tractor to deflect impact. In addition to developing contingency plans, NASA scientists are also searching the sky for future asteroid threats.
Sources:
Source article: https://www.vox.com/a/asteroid-day
Chicxulub impact information: https://www.jpl.nasa.gov/news/news.php?feature=8
NASA JPL: https://www.nasa.gov/asteroid-and-comet-watch
NASA asteroid tracking: https://www.jpl.nasa.gov/edu/news/2017/4/18/how-nasa-studies-and-tracks-asteroids-near-and-far/
NASA Center for Near Earth Object Studies: https://cneos.jpl.nasa.gov/
Congressional hearing on asteroids: https://www.c-span.org/video/?311602-1/threats-asteroids-meteors
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