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Q&A

Artificial water planet and shell world combo

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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 both water and air, and I wanted them to be able to swim in the water and also fly/float in the sky (but let's focus on the environment in this question).

Every possibility that exists in reality had some serious problems, so I ultimately decided to go with an artificially constructed world so as to counter any issues that would come up in nature. In other words K 2 or 3 aliens created this place (for reasons that will be dealt with in the story).

And here's the rub: I was reading another question- How dense of an atmosphere do I need to "float" an ocean of liquid at 1000 ft elevation? asking about basically an ocean in the sky. Because I like fantastic environments in sci-fi (and impossible to answer questions) I decided to add that extra problem, er"¦ element to my water planet.

So here what I've got (see diagram): It's an artificial construct, a shell world which is filled with air, that is covered by an ocean, that has an atmosphere; and the whole thing is small enough to be a microgravity environment but large enough to retain its ocean and atmosphere. I don't know how big this thing is though. Me am not good with da maths.

At this point I don't know how the interior would have light (artificially?) but I'm hoping that all three environments- atmosphere, ocean, and inner shell world, could be habitats that a being could travel between and live in. To that end I was thinking tunnels from the inner shell world through the ocean past the surface of the ocean and out into the sky. Maybe that could work? If you don't think so then disregard the tunnels suggestion. I'm starting to think it would actually be detrimental instead of helpful.

Incredibly Strong Shell (see diagram): could a powerfully built tensegrity or geodesic sphere do the trick?

enter image description here

Edit: This construct is an experiment by an alien species trying to invent new habitat for beings to live in. We can assume they know what they were doing but I allow for the possibility that the construct wont be stable forever.

So, is this construct possible? If not, please tell me where I've gone wrong and how it can be made to work. Thank you.

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This post was sourced from https://worldbuilding.stackexchange.com/q/108044. It is licensed under CC BY-SA 3.0.

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