Would a high gravity rocky planet be guaranteed to have an atmosphere?Would oxygen pool in sink holes if the upper atmosphere was helium, hydrogen and methane?What are the requirements for an atmosphere retaining moon with a stable orbit arround an earth like planet with non-destructive tidal forces?What would happen to a high-pressure creature in a low-pressure atmosphere? (3atm)What would happen to a high-pressure creature in a low-pressure atmosphere (50atm)?How fast would a planet have to be spinning for the centrifugal/centripetal force to cancel out the force of gravity near the equator?Could a planet larger than earth with half the gravity have a denser atmosphere?What are the climatological effects to the surface of a planet where the atmosphere gives way to vaccum? (diagram included)5km artificial planet, with same gravity as on EarthCould a habitable planet with lower gravity have a thick atmosphere?How can this habitable planet have a moon with a naturally occurring atmosphere?
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