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Pre-Modern Astronomy vs Habitable Venus
(05-30-2020, 02:17 AM)sandcastles Wrote: S.M. Stirling has two novels, In the Courts of the Crimson Kings, and The Sky People, in which Mars and Venus resembled the way they were portrayed in pulp fiction. He has a good rationale.

I just re-read that series a couple of months ago and enjoy it enormously. However, Stirling's reasons that Venus are habitable are "Lords of Creation" and "lots of clouds." While "lots of clouds" are exactly what's suggested in the link in my prior post to keep Venus-like planets habitable, those clouds are generated by extremely long rotations (days of 64+ Earth days long) on ocean-covered planets. Stirling's Venus has a 30-hour rotation.

Quote:Harry Turtledove involves Mars in several things, and has an alternate Mars in "A World of Difference".

Yep, got that one, too.

Quote:I saw the article about the moon not stabilizing Earth; what would be the situations where a large moon would be needed to stabilize a planet? Would a much larger planet ever experience chaotic changes in its rotation or tilt?

It's thought that Jupiter flips Mars on its ear every so many tens of millions of years. Venus, Mars, and Jupiter can influence Earth's tilt and eccentricity:

Having a big moon might stabilize that, though The Astronomer's link indicates that Luna is just a bit too big to do that job.
Mike Miller, Materials Engineer

"Everbody's always in favor of saving Hitler's brain, but when you put it in the body of a great white shark, oh, suddenly you've gone too far." -- Professor Farnsworth, Futurama

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Pre-Modern Astronomy vs Habitable Venus - by Cray - 05-27-2020, 10:57 PM
RE: Pre-Modern Astronomy vs Habitable Venus - by Cray - 05-30-2020, 04:14 AM

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