What complications would arise from a world with an internal atmosphere and environment?

For a long, long, long time I have had a concept of a world that exists on the inside of a hallowed-out sphere.

The basic construction of the world is like this: It is a large world, at the center of which is a very small but self-sustained star. Surrounding this star is an array of gasses that comprise an inner-atmosphere protecting the world from extreme radiation. Because the atmosphere needs to be so thick, rainfall is incredibly heavy, and because the 'sun' is so close to the surface, dangerous electromagnetic storms are common.

There are areas of much thicker atmosphere, which result in incredibly harsh cold climates, and due to the strong gravitational pull of the 'sun', there are bodies of water that lift right out of the ground and flow through the air, creating fast channels to other parts of the world.

Mining occurs, and overmining is causing a loss of atmosphere in this insulated inner-world, so this is already a problem that I'd be well aware of for such a world. And of course, there is always daylight, except during periods of high cloud coverage.

What other possible problems would I need to address to create a realistic sci-fi world that is essentially an insulated sphere like this one?

posted over 9 years ago

Zibbobz‭

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