Souper Posted June 28, 2014 Share Posted June 28, 2014 1. CO2 mining2. Subterranean bases / colonies / cities (that were at least 5 km underground, to prevent cave-ins)3. Space stations in orbit4. Terraforming5. Prisons (either in orbit, on the surface, or subterranean)6. A place 500$ says that you can land on, walk on, and return from7. Underground / orbital military bases8. Prospecting9. Underground Farms10. A place to slingshot to other planets. Duh! Link to comment Share on other sites More sharing options...
Roastduck Posted June 28, 2014 Share Posted June 28, 2014 what on earth.... Link to comment Share on other sites More sharing options...
Souper Posted June 28, 2014 Author Share Posted June 28, 2014 What can i say? I have a fascination for Venus. Link to comment Share on other sites More sharing options...
R0cketC0der Posted June 28, 2014 Share Posted June 28, 2014 Which of this things(except for the first and last one) can't be done on other planets with less work? Link to comment Share on other sites More sharing options...
PlonioFludrasco Posted June 28, 2014 Share Posted June 28, 2014 6. A place 500$ says that you can land on, walk on, and return fromI think I didn't get it... Link to comment Share on other sites More sharing options...
rkman Posted June 28, 2014 Share Posted June 28, 2014 This thread should be tagged "science fiction theory". Link to comment Share on other sites More sharing options...
Guest Fyre Flare Posted June 28, 2014 Share Posted June 28, 2014 5. Prisons That makes sense... Escape the Jail = Death. Link to comment Share on other sites More sharing options...
Skyler4856 Posted June 28, 2014 Share Posted June 28, 2014 Why would you need to mine for CO2?Other than for 02 as fuel, I really cant see a reason why the cost would be justifiable, relative to the income gained... Link to comment Share on other sites More sharing options...
shynung Posted June 28, 2014 Share Posted June 28, 2014 Why would you need to mine for CO2?Other than for 02 as fuel, I really cant see a reason why the cost would be justifiable, relative to the income gained...If there's water around, CO2 can be made into methane (CH4) using the Sabatier process, which also produces oxygen. Both are usable for chemical rocket propellants.Though, admittedly, Mars is easier to reach for those kinds of things, not to mention its much less hostile environment. Link to comment Share on other sites More sharing options...
Hattivat Posted June 28, 2014 Share Posted June 28, 2014 (edited) The only way Venus could ever be useful for habitation is if you have FLOATING cities. High in the atmosphere the temperatures and pressures are survivable, in some layers even comfortable. Going anywhere below 10 km above the surface (inluding subterrean structures) is pretty much suicidal.[edit:] It also makes no economic sense, as returning from the surface to orbit is estimated to cost a whooping 27 000 delta-v, mostly due to extreme atmospheric pressure. Edited June 28, 2014 by Hattivat Link to comment Share on other sites More sharing options...
m4v Posted June 28, 2014 Share Posted June 28, 2014 Not totally, is mostly useless. Link to comment Share on other sites More sharing options...
Ralathon Posted June 28, 2014 Share Posted June 28, 2014 1. CO2 miningWhy do that in a gravity well almost as deep as the earth's? If you want CO2 its easier to get it from volatile asteroids or Mars.2. Subterranean bases / colonies / cities (that were at least 5 km underground, to prevent cave-ins)It's more than 500 degrees celcius down there and nowhere to dump your heat. Going underground only makes that worse. A ridiculous amount of work to get a small habitable base on the bottom of a giant gravity well.3. Space stations in orbitWhy Venus?4. TerraformingPossibly, but mars is probably easier. Venus is just too close to the sun, so to maintain an earthlike temperature you need a lot less greenhouse gasses. Plants don't like that since they need that CO2 to live, so you need some creative solutions for that.5. Prisons (either in orbit, on the surface, or subterranean)Why venus? A spaceship isn't something you can build out of paper maché and dinner trays.6. A place 500$ says that you can land on, walk on, and return fromWat?7. Underground / orbital military basesWhy Venus?8. ProspectingDear god no! Venus is the WORST place to prospect for ores. All the heavy stuff has sunk to the core where you cant get it. It is also at the bottom of a ridiculous gravity well. Just get it from asteroids.9. Underground FarmsIn 500 degree celcius temperatures? Why not grow em on Earth instead, similar dV to get it to orbit.10. A place to slingshot to other planets. Duh!Only real use that terrible terrible place has. Link to comment Share on other sites More sharing options...
Mitchz95 Posted June 28, 2014 Share Posted June 28, 2014 Could someone please explain #6? Link to comment Share on other sites More sharing options...
Roastduck Posted June 28, 2014 Share Posted June 28, 2014 Could someone please explain #6?I think he's betting that it's possible to land on and explore venus, to which I say BS. At least in our lifetimes Link to comment Share on other sites More sharing options...
Tripzter Posted June 28, 2014 Share Posted June 28, 2014 Could someone please explain #6?I think hes betting 500 bucks that you can land, walk and return from venus.. I have the feeling the op doesn't know that the planet is almost 500C and and 92 bar of atmosphere pressure. Link to comment Share on other sites More sharing options...
Skyler4856 Posted June 28, 2014 Share Posted June 28, 2014 If there's water around, CO2 can be made into methane (CH4) using the Sabatier process, which also produces oxygen. Both are usable for chemical rocket propellants.Though, admittedly, Mars is easier to reach for those kinds of things, not to mention its much less hostile environment.So the only reason you're going to Venus is to get enough fuel to escape from the Venusian gravity well? Doesn't seem like the best idea... Link to comment Share on other sites More sharing options...
Skyler4856 Posted June 28, 2014 Share Posted June 28, 2014 Venus is, as Douglas Adams would put it, "Mostly deadly" Link to comment Share on other sites More sharing options...
Souper Posted June 29, 2014 Author Share Posted June 29, 2014 This is correct. But actually, it's not that hard, really. Walking on venus in a spacesuit is like walking in 1km deep water on Earth; easy. Easy, but EXHAUSTING.and yes, i'm not stupid. Venus is very hot and very dense. Link to comment Share on other sites More sharing options...
Roastduck Posted June 29, 2014 Share Posted June 29, 2014 I think that analogy might be overly simplistic Link to comment Share on other sites More sharing options...
rpayne88 Posted June 29, 2014 Share Posted June 29, 2014 1. possible, but not profitable2. How do you plan to build them without melting your equipment on the surface3. A good idea4. A LOT of time and a LOT of money, but possible5. Only for "Death Row" inmates. See #2.6. Land: Yes. Walk for a few seconds. Return from: no (see #2)7, 8, 9. No. See #210. We have a winner. The problem with Venus is that it is a physical Hell. I'm talking 800C surface temperatures. Nothing we have will last for long on that planet. Link to comment Share on other sites More sharing options...
shynung Posted June 29, 2014 Share Posted June 29, 2014 (edited) I think that analogy might be overly simplisticIndeed it is. A 1 km deep ocean floor on Earth has an ambient temperature of somewhere between 10-20oC, so cooling systems simply need to transfer the heat outside. On Venusian surface, the ambient temperature is 460oC, which means the cooling system now must work ridiculously hard to dump enough heat across the 435 degree gradient (assuming internal temperature of 25o). Anyone walking there, no matter in what suit, will eventually die from the heat, as the cooling system gradually failed due to the immense load set upon it. Edited June 29, 2014 by shynung Link to comment Share on other sites More sharing options...
SciMan Posted June 29, 2014 Share Posted June 29, 2014 (edited) I can see a way that 1 and 4 could be related.Basic idea is that you skim CO2 off of the atmosphere during aerobraking passes, bring it to orbit, and ship it to Mars where you use it to increase the greenhouse effect.Over a LONG time (500 years or more), that reduces the temperature and pressure on Venus, and increases the temperature and pressure on Mars.Mars might need a roof to hold in the atmosphere, but if we're talking terraforming then we probably either already have that technology or can develop it with 50-100 years worth of R&D.Of course, that doesn't mean we can do it right now. All it means is that there isn't anything in the laws of physics that says we can't EVER do it. Edited June 29, 2014 by SciMan Link to comment Share on other sites More sharing options...
cantab Posted June 29, 2014 Share Posted June 29, 2014 Hattivat has it. Balloons and airships, that's the way to go. Near-normal gravity to walk around in too. Link to comment Share on other sites More sharing options...
velve Posted June 29, 2014 Share Posted June 29, 2014 This is correct. But actually, it's not that hard, really. Walking on venus in a spacesuit is like walking in 1km deep water on Earth; easy. Easy, but EXHAUSTING.No, this is not easy, in fact it has not been done. IIRC the deepest a human has been is somewhere around 600 meters. I don't think you have a grasp on just how much 90+bar is. As for the rest of the points the slingshot is the only one feasable. Link to comment Share on other sites More sharing options...
Scotius Posted June 29, 2014 Share Posted June 29, 2014 Hattivat has it. Balloons and airships, that's the way to go. Near-normal gravity to walk around in too.And plenty of sulfuric acid in the air Good luck strolling outside. Link to comment Share on other sites More sharing options...
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