Tidelocked moons and Type V/B planets

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Tidelocked moons and Type V/B planets

Postby Crucis on Mon 19 Apr 2010 23:41

This topic isn't "news" related. Rather, it's to pose a sysgen related question.

From everything that I've read, it appears that the lack of a magnetosphere is likely a primary cause (or THE primary cause) for Mars' lack of an atmosphere and for the overall nature of Venus' super-dense atmosphere, due to the protective effects of the magnetosphere from solar winds which can carry away certain light atmospheric molecules (and leaving behind the heavier ones, in Venus' case).

So, I ask some hypothetical questions:

Type V planets with a Tidelocked Moon

What if a planet in Venus' location had a tidelocked moon, which should cause the planet to rotate relative to the sun (Venus' planetary rotation is amazingly slow at about 240 earth days), which would help the magnetosphere's required "dynamo"... How would this make the planet different? Yes, it would obviously still not be in the habitable zone, so it would hardly be a Type T/ST garden spot. But how would it differ from Venus? Might such a world be no longer so utterly nasty (to T/ST races) that it might be somewhat habitable? Perhaps simply an oversized (i.e. mass 2/3) Type H world with an "extreme" environment?

Mass 2/3 Type B planet with a Tidelocked Moon

What if a Mass 2 or 3 planet in the Rocky Zone, but outside of the outer edge of the habitable zone, had a tidelocked moon, or perhaps even a significantly large "enough" moon, that due to tidal stressing could help keep the planet more volcanically active and possibly keep its magnetosphere active. How would this make the planet different? Yes, it would still be in the "cold" zone outside of the habitable zone. But how would it differ from Mars?

Would such a planet still just be a "desolate" Type B (O2) barren planet, just with a more significant atmosphere (as described in both ISF and Ultra)? Or might such a more volcanically active planet with a magnetosphere have an environment that was somehow different from what one normally thinks of as "Desolate"? Could it be a "hostile" environment? BTW... not thinking of "hostile" in the sense where a Type T may be Benign, Harsh, or Hostile to different races depending all the various factors abstracted in the HI, but "hostile" as in more environmentally friendly than a normal "desolate" environment, but always "hostile" to T/ST races, largely due to the cold and other factors.

NOTE: This only really seems to be an issue for larger (mass 2/3) Type B's, since it appears that smaller planets, including smaller Type B's, have great difficulty retaining a magnetosphere.

BTW, when answering these questions, also think in terms of the effects on Starfire planetary and environment types.
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