宇宙有多大,这是一个无法回答的问题,因为直到今天,宇宙还在不断膨胀,这种膨胀是宇宙大爆炸的结果。大爆炸发生在150亿年前,我们所在的银河系就是宇宙爆炸后飞出的一块碎片。同样的道理,在宇宙大爆炸的每个方向上可能都有150亿光年,所以宇宙的空间应该至少有300亿光年。英国科学家马可斯·乔恩说,银河系有1000亿颗恒星,银河系的形状像个旋涡。除了这个星系之外,可能还 How big the universe is, this is an unanswerable question, because until today, the universe is still expanding, and this expansion is the result of the Big Bang. The big bang happened about 15 billion years ago. The galaxy we were in was a piece of debris that exploded after the explosion of the universe. By the same token, there may be 15 billion light years in each direction of the Big Bang, so the space of the universe should be at least 30 billion light years. British scientist Marcus Jon said that there are 100 billion stars in the Milky Way and the Milky Way is shaped like a vortex. In addition to this galaxy, it may also be