可能会危害地球的小行星之轨道
2021年8月29日 Orbits of Potentially Hazardous Asteroids Image Credit: NASA, JPL-Caltech Explanation: Are asteroids dangerous? Some are, but the likelihood of a dangerous asteroid striking the Earth during any given year is low. Because some past mass extinction events have been linked to asteroid impacts, however, humanity has made it a priority to find and cat...