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Psy-Kosh comments on How inevitable was modern human civilization - data - Less Wrong
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Really? Thanks. I thought it mostly was derived from gravitational energy as the earth formed and only a bit of extra nuclear heating. Though I guess it might not make sense that it would still be hot then...
Well, generally, elements heavier than iron only show up when a star goes kablewey, right? so it's "solar", but it's not OUR solar, which was kinda the point, I guess.
Since we've already gone down the rabbit hole of extreme pedantry, I should point out that "solar" properly only applies to our own star, sol. The adjective for stars in general is "stellar". If we ever bring solar panels to the neighborhood of other stars, this is going to be a nasty bit of terminology conflict.
Oh, good point about supernovae. I didn't know that.