By Jacob Aron....
A black hole sun could be friendlier than you might expect. Planets orbiting
a black hole – as they do in the film Interstellar – could sustain life,
thanks to a bizarre reversal of the thermodynamics experienced by our Sun
and Earth. According to the second law of thermodynamics, life requires a
temperature difference to provide a source of useable energy. Life on Earth
exploits the difference between the sun and the cold vacuum of space, but what
if you flip the temperatures around, with a cold sun and a hot sky? That’s
exactly what a planet orbiting a black hole would see, says Tomáš Opatrný of
Palacký University in Olomouc, Czech Republic – though it wouldn’t look much
like the one imagined by the grunge band Soundgarden.
https://www.newscientist.com/article/20 ... g-planets/
Is Life Possible Under A Dark Star?
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