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Questions tagged [space-constructs]

For questions regarding artificial structures that exist in space.

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3answers
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Building a Dyson sphere around the sun, what about one, or two steps farther? [duplicate]

I will assume that people know what a Dyson sphere is. So you build one to encompass the Sun, harnessing all of its energy, then why not make a big spaceship out of it and have the Sun as your power ...
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5answers
5k views

How deep must be a pit on the moon to hold atmosphere at 1ATM on the bottom

In my world I would like to create a pit on the Moon filled with air. How deep would the pit need to be to get 1 ATM of pressure Could the pit maintain the air or would it be lost to space? If it ...
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3answers
105 views

Anchoring a Deimos base

Some astronauts have just arrived in Mars orbit! They're fixing to set up a small refueling station/outpost on Deimos. One problem, how might they keep their small habitat and associated structures ...
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12answers
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What is the best design for docking onto a rotating space-station?

In the distant future, space-stations use centrifugal force to emulate gravity, effectively being a cylinder (or something similar like a wheel) spinning around a central axis at high speeds. A ...
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6answers
796 views

Are fly wheels a valid means of energy storage for powering a large space station?

This is something that was just offhandedly mentioned in a Sci-Fi book I read once and as I am now writing one myself I thought I might use it. The scenario is that I have a ship approaching a warp ...
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2answers
229 views

Is this station design likely to cause balance or vertigo issues?

This is a follow up to a previous question that I thought should be a new question instead of just discussing in the comments of that one. This is an idea for a space station on the surface of Eris ...
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1answer
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How big does a LEO object need to be to be clearly visible from the ground? [duplicate]

Pretty simple question I just don’t know the math for. If I want my space station/megastructure that’s orbiting 2000-ish km above Earth to seem roughly as large as the Moon to an observer on the ...
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1answer
121 views

How would I calculate the size and angle of this space station ring?

This is an idea for a space station on the surface of Eris (but could work on other celestial bodies), using rotating rings to simulate gravity. The idea is that these rings would sit horizontally on ...
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2answers
264 views

Dimensions of an O'Neill cylinder with gravity and coriolis force like surface of Earth

What would be the diameter and rotational speed of an O'Neill cylinder on the inside surface of which centrifugal and coriolis forces are equal to "gravity" and coriolis force on the surface of Earth ...
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Logistics: How to move humanity onto a spaceship that is being built from planet Earth?

Humanity builds a spaceship to leave Earth. For eight billion people or so, that vessel has to be gigantic. Using the metal from Earth's core for the construction and the biosphere to create a habitat,...
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2answers
128 views

First place to build the first mini space colony/factory [closed]

I thought it was a good question - somebody else ask it if you like.
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1answer
136 views

How to determine reasonable population density of a three-dimensional volume

I'm attempting to rough-estimate potential population density of three-dimensional megastructures in space. Assume a filled spherical volume (i.e. death star, not Dyson sphere), where all internal ...
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1answer
158 views

Would Rayleigh scattering (blue skies) be noticeable in an O'Neill cylinder?

In my story there is a full size (Island Three) O'Neill cylinder, 5 miles in diameter and 20 miles long. It doesn't have windows, but is lit internally down the center of the cylinder with a 20 mile ...
8
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1answer
180 views

Gravity differences on asteroid with an O'Neill cylinder

In my story there is something akin to an Island Three O'Neill cylinder buried vertically into the side of the asteroid Vesta. It is 5 miles across and 20 miles long. The station is buried but is ...
9
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4answers
2k views

Can I have wind turbines on my base?

Background A colony of humans has settled on a remote planet where there is little to no sunlight, but there is a plentiful amount of earth metals. E.g.- Iron, aluminium, Titanium, etc. There are ...
6
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1answer
219 views

A self-eclipsing orbital ring

A common, matter-efficient science-fiction habitat is a hollow cylinder or ring in space that is spun to simulate the pull of gravity on its interior surface. These habitats have been imagined as ...
13
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5answers
1k views

How fast would a Martian space elevator travel?

READ EDITS I am writing a passage about the main character of my book travelling up a space elevator to the spaceport that rests in geostationary orbit above Mars. This means that the elevator would ...
32
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21answers
8k views

If we can have “all the comforts of home” in space why would we settle planets?

This is something that is starting to bug me, I'm creating a universe in which space travel is cheap and comfortable and space habitats can be built roomy enough that no-one actually needs to live on ...
0
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1answer
68 views

Planet-sized creatures floating in breathable system-wide atmosphere

In the future, we created a Dyson Swarm. Each node (which I'd like to call a Gigalga) is an asteroid-sized, biotechnological, space-adapted, sentient plant that speaks the same evolved language as we ...
7
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3answers
280 views

Feasability of plasma based garbage recycling into pure constituent elements

Is it possible to build a garbage recycler that turns residues into its constituent elements using plasma and accelerating it through a magnetic field? The technology level is around that of the ...
10
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4answers
477 views

Prevailing winds on a rotating space habitat

A common, matter-efficient science-fiction habitat is a hollow cylinder or ring in space that is spun to simulate the pull of gravity on its interior surface. These habitats have been imagined as ...
1
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4answers
290 views

How tall do atmosphere retaining walls on rotating space habitats need to be?

A common, matter-efficient science-fiction habitat is a hollow cylinder or ring in space that is spun to simulate the pull of gravity on its interior surface. These habitats have been imagined as ...
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5answers
208 views

Should my Dyson Sphere be bigger? (Climate/habitable zone)

My world is a 1AU radius, 12000km thick Dyson Sphere with 6 equally spaced holes, 4 filled with water. The two main problems I have are gravity and heat. This question concerns heat and how to stop ...
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1answer
138 views

How to move up to one million Earth-mass planets? [closed]

Inspired by The One Million Earth Solar System. A civilization wants to create a solar system with a lot of earth-sized planets. How would they go about building it? Specifically, how would they move ...
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1answer
111 views

Possibility of a dyson sphere-esque structure with earth physics? [duplicate]

I have an idea for a DS-like world setting mostly set after the year 4200. The Earth was destroyed around 2500 and humanity moved from earth to an asteroid best and built a giant dyson sphere to live ...
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3answers
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Space station around the equator

I want to know what kind of effect a large circular space station would have on the planet if it went completely around the equator in one giant circle? Would it impact gravity or anything? And would ...
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2answers
113 views

What happens to an object when it passes through a portal? [closed]

As in the game Portal, if we create two portals on two different surfaces and then join the two surfaces with the portals facing each other, as soon as an object passes through one of them, what would ...
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1answer
247 views

Firing an AK-47 while anchored to the ISS [closed]

The Setup I magnetically anchor myself to the floor of the ISS. (yes I know there's no "floor", any wall will do) Then, I fire a 5-round burst out the airlock. The Question Can the recoil from ...
5
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2answers
115 views

Will be possible in the far future to create an artificial Moon for Earth and terraformed planets?

Will be possible in the far future to use megascale engineering to create an artificial hollow moon to give Earth a big moon in the sky like in billion years ago? Since it would be hollow, it would ...
6
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4answers
319 views

Feasibility of spacecraft constructed from ice

Eskimos in space! Let's say, just for contextual concerns, that a band of water-rich comet miners want to use water-ice found in the outer Solar System as the main structural and functional component ...
2
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1answer
109 views

How can a Dyson Sphere be built with minimal orbital disruption?

Dyson spheres are a staple of science fiction. Solar system spanning megastructures, they represent a significant effort by whatever species chose to build them, and a significant mass moved into the ...
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5answers
295 views

Will be possible in the far future to use megascale engineering to create a ringworld around Earth?

I mean in the far future megascale be advanced enough to allow the construction of a ring world around Earth or around a low mass star( a red dwarf for exemple). If yes, how big Earth would look from ...
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1answer
54 views

Effects Of Deorbited Space Elevator [duplicate]

What would happen to the earth is someone deorbited a space elevator? Let's assume it reaches up to geosynchronous orbit and the bottom is in, say, Dubia or some other part of the middle east. ...
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3answers
256 views

A structually self-supporting hollow Earth?

Is it possible to have a structurally self-supporting hollow Earth where the weight of the shell is balanced against the atmospheric pressure inside? It must be human habitable (gravity is nice but ...
29
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5answers
4k views

Can we stay healthy if we experience microgravity for 8 hours every day?

Let's say that at an asteroid mining site, the workers live in a rotating wheel space station that can produce 1g. They use Earth's 24 hour day, and for 8 hours a day, people go to the asteroid to ...
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4answers
269 views

What are the advantages of terraforming over living in space stations/constructs and visa versa? [duplicate]

It seems to me that the focus on colonizing other planets [edit: using closed/airtight structures] is misguided, and that building space stations with permanent populations would be easier, and would ...
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1answer
146 views

Accelerating artificial gravity station using solar wind

In the question Wind turbines in space The user asks about using solar wind to rotate turbine like things in order to get energy. Most answers say that using them to get energy would not work because ...
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5answers
214 views

Microgravity BBQ setup

The development of microgravity cuisine is an interesting topic, especially when it comes to transferring simple processes like the successful thermochemical processing of muscle tissues (e.g. ...
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3answers
198 views

What type of weapon makes the most sense for use on a spaceship [duplicate]

Supposing your spaceship was long and narrow, what type of weapon would be most practical on a spaceship made of the materials we make spaceships out of today with scaled hull thickness to equal the ...
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2answers
112 views

Space mall potential problems [closed]

Okay so you know those cool multi alien species bars in Star Wars and other science fiction media, well I'm working on one of those for my story and wanted to know about some potential issues with the ...
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2answers
135 views

Anti Personel Radiation Incendary Long Fallout Orbital Onset Laser Sattelite

For a story I'm working on I'm designing a sattelite to take down infantry from orbit, but without the power to take down tanks or infrastructure. The goal would be to kill off a military base, or ...
4
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2answers
226 views

Artificial water planet and shell world combo

I’ve been trying to create a water planet with certain aspects. I wanted it to have a breathable atmosphere and to be a microgravity environment. I’m developing humanoid characters that can breathe ...
4
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2answers
174 views

How far would reflected light penetrate into the interior of a McKendree cylinder from windows at each end

A McKendree cylinder is a rotating space station that is 920 km (580 miles) in diameter, and 4600 km (2900 miles) in length. This version would orbit the sun at 1 AU (at the same distance as earth). ...
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3answers
207 views

How would a space station operate if it had a population of roughly 1 billion people? [closed]

This space station would have artificial gravity similar to Earth's. It would not be orbiting a planet, but instead be orbiting a much larger celestial body, such as a star. Population growth is ...
7
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5answers
736 views

A place from which one could watch time outside move faster

Please reality check my place from which one could watch time outside move faster... A space station constantly moving at near light speed. The space station is created by a race with superior ...
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2answers
144 views

How would you get a “sun” to orbit a “rogue planet”? [closed]

So let's say I have rogue planet the size of mars. I want seasons roughly the the same as Earth and a "sun" that appears similar to our sun from the surface. How big would the Star need to be? How ...
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22answers
25k views

Why can't spaceships go underwater?

It is a somewhat common limitation of spaceships in some universes, that they cannot go underwater. They can land on the planet, take off into orbit, hyperdrive into the next star system, but they ...
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2answers
203 views

How to keep this artificial water planet from evaporating or freezing?

Piggybacking on this question: Could soft matter infused with nano or pico sized magnets be used to clump together so that we could create environments with it? ...So we have a planet that has lower ...
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2answers
238 views

Could soft matter infused with nano or pico sized magnets be used to clump together so that we could create environments with it?

I am trying to create a planet with low gravity that keeps an atmosphere and has an ocean that covers the whole planet. Basically I am developing beings (separately from this question) who can live in ...
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2answers
122 views

Gateway guardian stations

In space the most valuable resource is a very limited number of super advanced gateways that form a massive, galaxy spanning network with each other. Obviously, each major faction is going to try to ...