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9 天
如何计算出宇宙中有超过一万亿个星系的?
话说这宇宙吧,那可是相当的浩瀚无垠,就跟老铁们的脑洞一样,没边儿!它里面充满了各种星系,啥意思呢?就是一堆星星、气体、尘埃啥的,被一种叫做引力的东西拉在一起,组团出道了。咱们住的地方,地球村所在的银河系,也就只是这茫茫宇宙中的一粒沙子罢了。
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