Eh, space colonies have a big disadvantage, your need to carry your future materials with you. On a planet air and basic bio-matter is free. On a space habitat you need to recycle it all for at least a decent period of time.
If you periodically go to a garden world to get stuff it can work, but long term food logistics would be at the very least would require a considerable amount of space and mass just so we could cycle bio matter through, and that inst talking about possible population increase.
This really isn't the case. Closed biomes are something that we have already been studying for the last 50 years and they aren't
that hard to do. Honestly
none of the technology involved in space colonies is really that hard. The biggest issue is that any successful colony has a minimum population size which in turns necessitates a minimum colony size.
Now the
absolute minimum size for a colony to be viable is around 160 but if we want a robust colony without any restrictions on breeding partners and a good coverage of vital skills something like 5,000 people is probably preferable. So how big does the colony have to be to support 5,000 people? Well numbers vary a
lot depending upon who you ask and what the exact method you are using is but I'm going to be cautious and estimate 1000m^3 per person. That gives a total station volume of 5,000,000m^3 or a station roughly 200m x 200m x 125m.
So how much would such a station cost? Well we know the costs for the following:
Tiny Space Station (2/3 Size): 100 million credits
Small Space Station (6/8 Size): 1 billion credits
Medium Space Station (13/16 Size): 10 billion credits
Large Space Station (28/32 Size): 100 billion credits
and we also know the large axis of those stations:
Secondly I'm further playing with the idea of general space stations as such space stations now have a limit to the total size of buildings they can contain.
Tiny 2
Small 6
Medium 13
Large 28
Frankly I'm still in the making up number phase and those are may be a bit small especially at the higher end so if someone wants to forward a sane argument for other values go ahead. For reference small medium and large would be ~300, 600 and 900 meter on their primary axis. Tiny was supposed basically be the one building space station so in the 2-4 range.
So the station dimensions are:
300m = Size 8
600m = Size 16
900m = Size 32
which makes it clear that each additional 300m of radius is simply a straight lengthening of the station since the overall size is equal to multiple 300m stacked end to end.
This doesn't actually tell us the internal volume though size we have no idea what the secondary axis radius is. However we can do some working backwards to determine the
minimum radius required to hit the goal of 5,000,000m^3
5,000,000 / 300 = 16,666.67m^2 = 72.84m
5,000,000 / 600 = 8,333.33m^2 = 51.50m
5,000,000 / 900 = 5,555.56m^2 = 42.05m
and on the face of it none of those radii seem unreasonable large. Still lets go to one of the few references we have for size; starships. A couple years back I found this
awesome image displaying scales for Alliance ships. Sure it's non-canonical but it looks reasonable. Pixel measurements give the following:
Dreadnought = 561px
Cruiser = 328px
Destroyer = 182px
SR2 Normandy = 89px
SR1 Normandy = 63px
and if we assume the dreadnought is 1,000m long then that comes out to:
Dreadnought = 1,000m
Cruiser = 584.7m
Destroyer = 324.4m
SR2 Normandy = 158.6m
SR1 Normandy = 112.3m
which comes fairly close to what we'd expect given the numbers we are given. If we use the dreadnought as a scale for the diameter of the space stations, since it's fairly similar in length to the Large Space Station and it been much skinnier would look
weird, we get 63pxs or 112.3m. Halving that gives a radius of 56.15m which puts the Medium Space Station as the minimum size required to house 5,000 people long term.
Given that Medium Space Stations cost 10 billion credits and house about 5,000 people that means the station would cost around 2 million credits
per person and have maintenance costs of around 100,000cr per person per year. That is almost certainly well above the average
total income per person on the station let alone what they can afford to pay towards maintenance. So for any future station plans to be practical we really have to drop the cost, both initial and maintenance, significantly.
Question for everyone.
In regard to powered armor, is it correct to say that the Systems Alliance currently has the advantage? How does Legionnaire armor compare to other factions' powered armor such as the Tuirans, Asari, and the Salarians? Does the SA outnumber everyone else in the number of troops operating in powered armor?
Depends upon how you define powered armor. Technically
everyone's armor is powered armor. It's just their power armor isn't as awesome as ours. The Alliance has a significant advance in quality but due to it's newness it is
really behind in personnel. Humanity just doesn't have the population of older races like the Asari and Turians. I made estimates ages ago, which have been used fairly commonly, that the Alliance military has about twelve million total. Although a good chunk of that is that the Alliance is actually barred from having a ground army with that being reserved for the various member nations. All the troops the Alliance deploys are either 'marines' who aren't 'technically' army soldiers or soldiers from the armies of the various member nations.