translation.en: Now, the advantage of studying our own galaxy is it's simply the closest example of the center of a galaxy that we're ever going to have, because the next closest galaxy is 100 times further away.
translation.zh: 研究我们自己的星系的优势是 在我们接触过的星系中心的实体中 这是距离我们最近的星系 我们的邻居星系距离我们则足有100倍的距离