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still being of sufficient mass to maintain a long-lived internal dynamo and magnetosphere. m = 0.26M g = 0.63g escape velocity = 7.13 km/s So, this planet is low gravity but is capable of holding onto an atmosphere …

I'm designing a lower gravity planet that I want to stay relatively warm despite having less atmosphere. … Does complex life need as high a percentage of nitrogen in the atmosphere as Earth has or could it be substantially lower? …

Everything else being equal, how would reduced planetary mass and gravity affect the behavior of the atmosphere and the climate? …

On Earth, oxygen makes up 21% of our atmosphere, with a partial pressure of 0.21 atm. In a 10 atm atmosphere, with oxygen at 10%, this would be 1 atm, which is higher than on Earth, obviously. … Would an atmosphere like this provide higher or lower access to oxygen than on Earth? I guess what I'm wondering is, is partial pressure or concentration of oxygen more biologically significant? …

I'm wondering whether atmospheric pressure (high or low) would have any impact on the favorability of hydrostatic skeletons. Obviously hydrostatic skeletons work well in water, but I'm not sure if a g …

I'm building a some hypothetical habitable planets for a book, and one of these planets has a thick atmosphere (around 10 bar). … I'm not sure if it's even possible, but I want to figure out how the animals on this planet could avoid nitrogen narcosis (the atmosphere is mainly nitrogen, as on Earth). …

I'm designing planets of varying atmospheric pressures. How would increasing (or decreasing) global atmospheric pressure affect the amount/frequency of precipitation over a planet?

I'm designing a few planets and the life that could inhabit them, and was wondering if an uncommon Earth phenomenon like iridescent clouds might be more common on a planet under different conditions. …

Maybe the atmosphere is anywhere from 0.1 - 1 bar. … Would the surface of this alternate Ganymede be protected by it's atmosphere against the charged particles coming from the planet's radiation belts? …

I want to give the planet an Earth-like atmosphere (in terms of composition), but the fact that the gravity is lower might mean that the atmosphere would be less dense and expand farther out. … (I'm thinking maybe increasing the total mass of the atmosphere, ocean size/depth, rotation rate, etc). I have some general ideas but no confidence that they make sense. …

I’m wondering if anyone has any scientifically plausible ideas for adaptations to a high atmospheric pressure (10 atm) environment. This pressure would be too high for humans to survive for extended p …

Leaving aside the atmospheric composition (let's say there's the same amount of oxygen, despite the higher pressure), would the pressure itself have any effect? Would plants need to be stockier and st …