Comment on A City on Mars: Reality kills space settlement dreams
c0mbatbag3l@lemmy.world 11 months agoYou do realize that Martians abandon Mars because the protomolecule opens up worlds that are already habitable, so terra forming becomes pointless? It has nothing to do with infrastructure or economy, Mars is supposed to be an eventual second home, not a place to mine. They leave because interstellar travel becomes a reality before Mars becomes viable.
Unless we discover that Charon is actually a Mass Relay, Mars is the best possible second place for humans.
Titan is too cold and the atmosphere would require a full changeover, and the Galilean moons are constantly bombarded with radiation, Venus could support a floating colony but thats tenuous at best. Mars is basically it, if we can develop the tech to turn it into a reasonable place to be.
guitarsarereal@sh.itjust.works 11 months ago
Yeah, but the point is that if you want the real-world equivalent to the habitable worlds opened up by the protomolecule as regards Mars, that’s actually just the entire rest of the outer solar system, especially the moons and asteroid belt. They’re exactly as habitable as Mars will ever be in actual reality. Mars stops mattering except as an orbital pitstop as soon as there are places that are just as good if not better developed farther out, in smaller or non-existent gravity wells.
Mars has no active geology, therefore no Van Allen belts, therefore the only shielding you get is if you bury yourself. And to generate the energy required to artificially generate Van Allen belts that can actually protect us from cosmic rays… first, it’s a preposterous amount, second, it’s energy rent you have to pay in perpetuity to get an inferior environment anyways and zero resources that aren’t available in greater abundance in cheaper gravity wells, because you’re not realistically going to be spinning up the core anytime soon.
Then there’s the 38% Earth gravity, which A - is likely to be as unhealthy as a spun-up semi-microgravity environment B - isn’t strong enough to retain any atmosphere thick enough to support humans, which means not only do you have to pay a continuous gargantuan energy rent just to one day walk on the surface, you also have to import atmosphere which you’re guaranteed to have to replace.
I enjoy the Expanse, but in spite of its hard science reputation it’s honestly about as realistic as Star Trek in a lot of ways. Terraforming Mars is a fun thought experiment but Jules Verne level out of date at this point.