Let's cut to the chase: the Milky Way galaxy is a vast, flat, disk-shaped collection of gas, dust, and stars — a sprawling megalopolis that's a mind-crushing 100,000 light years across and several thousand light years thick.
银河系是一个巨大的、扁平的、盘状的气体、尘埃和恒星的集合——一个庞大的大都市,直径达10万光年,厚达几千光年,令人叹为观止。