Last Updated
：2025/11/28
Hubble time
Noun
Japanese Meaning
ハッブル時間: ハッブル定数（H₀）の逆数として定義される定数であり、宇宙の膨張率を示す値。 / 天文学・宇宙論において、宇宙の年齢の概算指標として用いられ、約4.55×10¹⁷秒または14.4 billion years（14.4十億年）に相当する。
（ plural ）
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(astronomy, cosmology) A constant defined as 1/H_0, where H_0 is the Hubble constant. 1/H_0 is equal to 4.55×10¹⁷ seconds or 14.4 billion years.
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Hubble time
When we measure cosmic evolution in units where the Hubble time is 1, many equations simplify considerably.
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When we measure cosmic evolution in units where the Hubble time is 1, many equations simplify considerably.
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