turdas comments on Lmao

[–] turdas@suppo.fi 16 points 5 months ago (9 children)

I think Mars, assuming you terraform it, would be pretty close to that on both counts. Space planes might still be difficult, but the delta V is much lower and Olympus Mons would pretty much sit above the atmosphere.

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[–] YellowParenti@lemmy.wtf 12 points 5 months ago (8 children)

Holy shit, I hadn't considered that you could use Olympus Mons as a launch site cause it sticks so high up.

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[–] turdas@suppo.fi 15 points 5 months ago (7 children)

The best part about it is that it's an extremely gradual slope completely unlike the mountain ranges on Earth, so you could haul stuff up there on trucks or trains easily.

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[–] CheeseNoodle@lemmy.world 16 points 5 months ago (6 children)

The problem is you can't have mountains like that on tectonically active planets (a mountain that big on earth would sink into the mantle), which is kind of a prequisite for a long-term magnetosphere so its unfortunately not something a species could likely ever have except as a result of terraforming a world like mars and setting up some kind of artificial magnetosphere.

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[–] cogitase@lemmy.dbzer0.com 5 points 5 months ago (3 children)

Is there a lower density limit for having a magnetosphere though? A habitable planet with 1.5x earth radius and the same mass would be much easier to get off of.

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