ringoron9 t1_j2d9p99 wrote
Just climbing a mountain already tells you that pressure goes down. The rate at which this happens depends on altitude, we could calculate that far above there is practically no air, and therefor no oxygen.
Gravity was pretty well understood by then, so we know how strong gravity in space is. Also, it's a common misconception that there is no gravity in space. At the altitude of the ISS, Earths gravity still is about 98% of sea level gravity. The zero gravity is only possible in orbit where the forces cancel out.
TheMan5991 t1_j2dasck wrote
> The zero gravity is only possible in orbit where the forces cancel out.
Zero gravity is not possible anywhere. Zero Gs, on the other hand, is possible almost anywhere. Orbit is just the best place to experience zero Gs for any significant amount of time.
taylaj t1_j2dd9ef wrote
This is an interesting statement. Is there no place in the universe so distant from any large mass that 0 gravity or negligible gravity could be attained?
Force of gravity drops exponentially with distance so I feel like this is very possible.
Edit: after a little googling and finding out the shockingly huge mass of stars like our sun. I believe finding a spot in space with negligible gravity may be harder than I thought.
Lagrange points are cool in that the gravity force of two masses cancel out there, but it's really no different than how orbiting causes 0 g's even though gravity is still present
ramblinjd t1_j2dfikw wrote
Yeah my first thought was Lagrange points are probably the closest thing to what you're describing.
DavidRFZ t1_j2dfnmv wrote
If we were not orbiting the sun and were directly feeling it’s gravity, it would be about 1600 times weaker the gravity we feel on earth.
I don’t know how weak gravity has to be before you feel “weightless”, though. That’s a good question.
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