烈火焚城，烟云漫天，古城沦陷，英雄何在？愁绪缠绕心间。许艺昌在线未删减版

　　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)