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When astronomers discuss the scale of the cosmos, they often refer to Sagan's number to convey just how many stars exist.
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When astronomers discuss the scale of the cosmos, they often refer to Sagan's number to convey just how many stars exist.
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Related words
Sagan's number
Proper noun
Japanese Meaning
観測可能な宇宙に存在する全ての星の個数を指し、通常はセクスティリオン級（非常に大きな数：10の21乗以上といわれることもある）と見積もられています。
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