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宇宙最大恒星直径30亿公里，宇宙中存在直径超过1光年的天体吗
宇宙中最大恒星史蒂文森2-18直径30亿公里，换成光年单位只有一万分之三光年，那么宇宙中存在直径超过1光年的天体吗？宇宙中直径超过1光年的天体是什么？
奇妙的宇宙2/86
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