The idea in its simplest form is that a stellar system of planets is within a transparent gas cloud that includes oxygen. The gas cloud is so incredibly dense (around sea level earth pressure) that humans can breathe and survive in open space.
I would like to use real world physics as much as possible, however some serious wand waving or over-simplifying is necessary and i would love some help.
Obvious issues that come to mind:
- Friction. Planets orbit incredibly fast and will burn up. Maybe solved if the gas cloud itself spins at the same rate as the orbiting planets (adjusting for distance from star as well). Space craft could be explained by some king of magnetic shield that magically displaces the gas without huge amounts of energy being expelled.
- Oxygen = boom. Maybe the star's gravity will prevent a chain reaction of ignition. Or maybe it won't be an issue, after all a candle draws in oxygen, not the other way around.
- Gravity sucking in the gas. I have no solution for this. Although I guess there's only so much gas that can fill the gravity well of a planet.
- Air pressure. The combined mass of the gas cloud could explain air pressure in a vague way, however this pressure might increase a lot around the planets? After all, deep sea has more pressure, therefore it stands to reason that an astronomical expanse of gas would result in an enormous amount of pressure. Although that pressure centres on the star, it might still be crushing on each planet.
My goal is to have reasonable explanations that are pseudo-scientific and familiar to the average reader.