#Exoplanets

Tag: #Exoplanets

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#159 The Unspent Time: Why the Universe Has Used Barely a Thousandth of Its Habitable Span#159 The Unspent Time: Why the Universe Has Used Barely a Thousandth of Its Habitable Span
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The Civilizational Brief

#159 The Unspent Time: Why the Universe Has Used Barely a Thousandth of Its Habitable Span

I will begin with a division. The universe is 13.8 billion years old. The lowest-mass stars that burn hydrogen shine for up to ten trillion years. The quotient is 0.138 percent.

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Sep 6
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