We’ve known how to create “gravity” in space for a long time, spinning the craft and living in the outskirts. Is it not obvious that getting close to 1g is optimal? Do we need to have people in bed for 60 days to figure this out?
Never mind. Answered my own question.
I guess the question of “whether to spin around a person’s head or chest” is still on the table, though I’m not sure why.
Its helpful to figure out how far you can deviate away from 1g or how much rpms people can tolerate since people can get nauseous at higher spins when moving around. with higher rpms or lower g allowances you can vastly shrink ship sizes from kilometers to 10s of feet.