烈火焚城，灰烬漫天；昔日繁华，化作烟云。伽罗太华被bvk

　　An asteroid much larger than that which caused the Chicxulub Crater is attacked by a ten-megaton nuclear warhead minutes before its collision with Earth, breaking it into three pieces, the largest of which bounces off the Earth's atmosphere. This "substantially changes the Earth's orbit", due to the amount of energy released by the asteroid piece (the size of Iceland) bouncing ... (展开全部)