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# /sci/ - Science & Math

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 >> Anonymous Sun Jan 19 12:11:25 2020 No.11314384 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>11314291Mars' specs:• Gravity (g): 0.377g (37.7% of Earth's 1g)• Atmospheric Pressure (AP): 0.636 kPa (0.62% of Earth's 101.325 kPa AP at sea level and 1.88% of Mount Everest's 33.7kPa AP)• Radiation: 0.2 to 0.3 Sv per year (97-98% more than Earth's average of 6.2 mSv/0.0062 Sv per year.)• Solar Radiance: 590 W/m^2 (59% of Earth's 1000 W/m^2)Mount Everest's peak has an altitude of 29,029 feet (5.497 miles) above global mean sea level on Earth. That is on average 30 kPa. Mars atmosphere pressure is only 0.610 kPa.>Earth's atmosphere is about 300 miles (480 kilometers) thick, but most of it is within 10 miles (16 km) the surface.Thus, in a round about way Mount Everest's peak is about a bit more than halfway up into Earth's usable atmosphere. Meaning, there's only about 4.503 miles of atmosphere above it. Let's pretend this is the distance we need for your exercise,Mars diameter: 4,212.3 milesMars volume: 39,100,000,000 cubic milesNeeded atmosphere thickness: 4.503 milesMars Dia + Atmosphere thickness = 4216.803 milesMars Dia + Atmosphere volume = 39,300,000,000 cubic miles39,300,000,000 cubic miles - 39,100,000,000 cubic miles = 200,000,000 cubic milesYou need 200,000,000 cubic miles of breathable air to reach Mount Everest level of atmospheric pressure on Mars.21% of 200,000,000 cubic miles = 42,000,000 cubic miles (68,731,291 megatons) of pure oxygen needed.79% of 200,000,000 cubic miles = 158,000,000 cubic miles of pure nitrogen needed.>all calculations are fuck terrible and make wide assumptions and probable have huge mistakes everywhere.>greenhousesNot enough light from the sun to do that. Radiation shielding will strip the rest of the light until windows are no longer windows. Use RTGs for energy to power LED grow lights instead.>release the oxygen created to create the atmosphereAs the above calculations show, you are going to need a shit load of gas to give Mars any kind of remotely usable atmosphere. Plants will not help.
 >> Anonymous Sat Jan 4 19:18:37 2020 No.11277796 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>11275864You only need to make space colonies, not planet colonies.
 >> Anonymous Sat Dec 14 13:26:03 2019 No.11225680 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>11225630>Any hopes for metamaterialsNone at all I'm afraid. Pretty much ever, "'amazing material just around the bend,' researchers say," is just grant farming.While this image is quite a big meme fest, check out the white section listing specs for celestial bodies and the viable colony section. Ridiculous amounts of radiation shielding aside, there are a few planet possibilities for colonies. Those planets provide nearly 1g, allow normal pressure at floating city altitude, and other than Venus they have high fuel atmospheres for colony use along with being much cooler than frying temps. It'd be easier to heat something up than cool something off after all. Rotations for Saturn/Uranus/Neptune are 10.52 hours for 1 Earth day/17.24 hours for 1 Earth day/>16 hours for 1 Earth day, respectively. Thus, all of those could probably have a sky hook if those things were possible, baring ring interference over all 3 of course. Though, I don't see the need.The floating city idea comes from the the pressure you mention. A balloon here on earth need to have a gas that has less pressure (lighter than air) than the air you breath right? Well, on Venus, Saturn, Uranus, and Neptune the 101kpa pressure we have here at sea level is actually way up high in the atmospheres of those planets. So, a "balloon" with normal Earth air and normal Earth air pressure could float around that height somewhere. Thus, a floating city that use normal materials to hold itself together. Jupiter also has a gas pressure zone like that, but its gravity at that zone is too much if I recall correctly.The fear of crashing isn't too much or a problem when using cellular construction where an explosion would only rupture a scant few cells at most. The rest of the structure's cells would still hold everything afloat without much problem if any.
 >> Anonymous Thu May 16 17:45:06 2019 No.10649228 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>10643592Highly. Because you'd need a shit load of mass. I think the calculations are in this image in the terraform section.
 >> Anonymous Thu Apr 11 12:04:22 2019 No.10546341 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>10543696>Terraform Mars
 >> Anonymous Mon Apr 1 08:20:24 2019 No.10514047 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>10510412HAHAHAHA
 >> Anonymous Thu Mar 14 23:01:41 2019 No.10468267 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>10465635Close solar orbit. Thick shielding, no windows, lots of passive solar steam punk electric generation.
 >> Anonymous Thu Feb 14 15:49:05 2019 No.10387897 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>10387882>Mars colony>Mars terraformingPipe Dreams
 >> Anonymous Mon Feb 4 15:37:58 2019 No.10357231 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>10357206>>10357189>>10357195That is why you need to make some sort of support structure to held it together. Something akin to spraying it with truck bed liner then covering it with metal netting. lol
 >> Anonymous Sun Dec 16 15:58:23 2018 No.10220695 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report] >>10220674>Realistic terraformingYou are deluded. There is no such thing at all. It is pure science fiction. You do realize this >>10219904 image is pure satire right? As far as colonies on Mars? Shit dude, you are 200% delusional if you believe that will happen in any shape or form.
 >> What do we do about the space meme?  Anonymous Wed Apr 18 14:53:05 2018 No.9681409 [View] File: 1.19 MB, 1360x3472, 1490979759989.png [View same] [iqdb] [saucenao] [google] [report]

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