EPISODE · Jun 24, 2020 · 4 MIN
比邻星离太阳就有4光年,直径10万光年的银河系怎会有1000亿颗恒星?
from 天文随心听|讲述宇宙与人的故事
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比邻星离太阳就有4光年,直径10万光年的银河系怎会有1000亿颗恒星?
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