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[-] Dirt_Owl@hexbear.net 92 points 2 weeks ago* (last edited 2 weeks ago)

I think people underestimate just how much resources would be required even for our own planet to be fully space faring.

The fuel for our current ships, for example, is in short supply. There is only so much rocket fuel on Earth and each time we send something up requires a LOT. Remember that next time Tesla sends some burger or CEO to space for a PR stunt.

People treat technology and science like it's some magic thing that will keep getting more advanced to the point it can do any magical thing. But sometimes the answer science gives you is "there is literally not enough matter and energy on our planet to ever do this." But of course we have these weird infinite growth brainwarms that see technology like a progression line in a video game instead of the result of observing and studying the material world.

[-] Sulv@hexbear.net 56 points 2 weeks ago

Don’t listen to this alien propaganda

[-] Dessa@hexbear.net 35 points 2 weeks ago

The absolute idiot. If we don't have enough matter, we will simply create more

[-] TankieTanuki@hexbear.net 23 points 2 weeks ago

Aliens pay me good money to post here you better not fuck up my gig.

[-] BeamBrain@hexbear.net 44 points 2 weeks ago* (last edited 2 weeks ago)

People treat technology and science like it's some magic thing that will keep getting more advanced to the point it can do any magical thing. But sometimes the answer science gives you is "there is literally not enough matter and energy on our planet to ever do this."

I blame the Civilization games

Liberal capitalism too, but also the Civilization games

Incidentally, this is one thing I love about Shadow Empire. It's a 4X game that takes place on a randomly generated planet, all resource deposits are finite, and you have to tailor your economic and military strategy to the planetary conditions and resources available. If the planet's a lifeless rock, it won't have any oil reserves, so your motorized and mechanized forces will have to rely on biodiesel or electric engines. No atmosphere but lots of rare earth metals? Get your power from solar panels. Bone-dry desert world? You will fight all-out wars for an underground lake.

[-] CthulhusIntern@hexbear.net 19 points 2 weeks ago

This mindset existed long before Civ though.

[-] dannoffs@hexbear.net 38 points 2 weeks ago
[-] Dirt_Owl@hexbear.net 21 points 2 weeks ago

Fuck I forgot to consider doge

[-] Damarcusart@hexbear.net 8 points 2 weeks ago

Only to the moon though.

[-] radio_free_asgarthr@hexbear.net 35 points 2 weeks ago

A space elevator would fix this.

[-] KuroXppi@hexbear.net 29 points 2 weeks ago* (last edited 2 weeks ago)

Imagine getting in the spave elevator and some jerk presses all the buttons 😩😡

[-] Nama@hexbear.net 8 points 2 weeks ago

I'm gonna take the space stairs and hit the stop button on every level.

[-] Dirt_Owl@hexbear.net 19 points 2 weeks ago* (last edited 2 weeks ago)

What do you mean? Is there even enough steel on earth to build something that tall? How would such a structure be possible when we can't even keep our ground level structures properly maintained?

[-] hexthismess@hexbear.net 30 points 2 weeks ago

The current idea is carbon tubes to make the supports light enough, but material science is nowhere near close enough for a space elevator.

[-] Sasuke@hexbear.net 20 points 2 weeks ago

and this is why we must build the space staircase first before we embark on the mysteries of the elevator

[-] FedPosterman5000@hexbear.net 4 points 2 weeks ago

Oof I’ve heard of a walk-up but this is ridiculous!

[-] KobaCumTribute@hexbear.net 17 points 2 weeks ago

The key idea of a space elevator is that it's being held in tension by a counterweight just past the point of a geosynchronous orbit. The problem of course being that even being in tension like that we don't have anything that could support its own weight let alone the capacity to construct and place such a massive structure.

[-] kristina@hexbear.net 12 points 2 weeks ago

A side note is that earth is probably one of the worst places for a space elevator anyways, the moon isn't an awful choice though.

[-] Le_Wokisme@hexbear.net 11 points 2 weeks ago

supposedly we could do one on the moon to lunar orbit with current materials....

except for the gosh dang UV sensitivity

[-] Meltyheartlove@hexbear.net 25 points 2 weeks ago* (last edited 2 weeks ago)

Me if they send me to space pika-pickaxe

[-] newmou@hexbear.net 18 points 2 weeks ago

China’s single thorium reactor will take us there

[-] Xavienth@lemmygrad.ml 16 points 2 weeks ago

Hydro-LOx (read: water) is one of the most efficient conventional fuels, and it's in use in NASA's Space Launch System powering the Artemis program.

Even if you assume somehow all the fresh water has disappeared, there's still solar-powered electrolysis to create hydrolox from sea water.

[-] Dirt_Owl@hexbear.net 11 points 2 weeks ago* (last edited 2 weeks ago)

Even if you assume somehow all the fresh water has disappeared

https://www.bbc.com/future/article/20170412-is-the-world-running-out-of-fresh-water

there's still solar-powered electrolysis to create hydrolox from sea water.

Hasen't that been abandoned for being too expensive/resource consuming?

[-] Xavienth@lemmygrad.ml 18 points 2 weeks ago

It's not too expensive, it's just more expensive than getting hydrogen from fossil fuels, so the only reason you'd electrolyze hydrogen from water right now is if you're trying to be green.

[-] iridaniotter@hexbear.net 16 points 2 weeks ago

Yeah you're doing the spaceflight equivalent of the great horse manure crisis. Earth-to-space technology begins with rockets.

[-] Dirt_Owl@hexbear.net 12 points 2 weeks ago* (last edited 2 weeks ago)

What else would possibly produce enough energy? Some imaginary technology we haven't made yet? Something that defies the laws of matter and energy? We just assume we will find or create something before that fuel runs out, even though there isn't a solid reason for us to make these assumptions other that "Sci-fi movies told me so."

Expecting something that we have no reason to assume exists to save us isn't any different from believing in the second coming.

[-] iridaniotter@hexbear.net 5 points 2 weeks ago* (last edited 2 weeks ago)

You're speaking without any investigation in the matter. In the 21st century, advanced spaceplanes, electromagnetic rail assisted launches (there was even a post about this here, and it concerned China so everyone was a big fan), and sustainable & advanced energy infrastructure that can synthesize fuels is the future of the launch industry. Eventually, costly and complex infrastructure projects such as skyhooks and launch loops can be employed. The task of humanity is to develop the productive forces that enable such projects, not throw our hands up in the air and pretend we will be stuck with the Saturn V and fossil fuels for all eternity.

[-] krolden@lemmy.ml 15 points 2 weeks ago

There are more resources in the solar system though

[-] Dirt_Owl@hexbear.net 11 points 2 weeks ago* (last edited 2 weeks ago)

How do you extract them? How much energy would you be expending by extracting them?

[-] CrawlMarks@hexbear.net 6 points 2 weeks ago

If you don't have to worry about money you can be very efficient with energy. It just takes a little mass to trick asteroids to leave the belt and hang out near the moon if you don't have to have it done in time for a quarterly profit.

More iron than we can imagine nice and easy.

this post was submitted on 20 Apr 2025
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