科学家深信，宇宙和地球的早期若不是有三类“巨大突发事件”天文现象发生，我们也不会生活在这个世界：一次戏剧性的“大爆炸”揭开了宇宙膨胀演化的序幕；激烈变化的“超新星爆发”填满了太阳系内处处可见的重元素，使地球有足够多元的物质来构筑生命体；巨大的彗星或星体对 Scientists are convinced that if there are three types of “great emergency” astronomy in the early days of the universe and the earth, we will not live in this world: a dramatic “big bang” has opened the prelude to the expansion of the universe; fierce changes have taken place. The “supernova explosion” fills up the heavy elements found everywhere in the solar system, making the Earth have enough diverse material to build life forms; giant comets or pairs of stars