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Not entirely sure about all the ISS tests but most space biology experiments seem to be zero-g. We know a lot about how life survives at 1g and 0g but very litt
by A2017U1 8y ago
Not entirely sure about all the ISS tests but most space biology experiments seem to be zero-g.
We know a lot about how life survives at 1g and 0g but very little about in between, so hopefully it goes ok, quite a unique experiment.
- jsjohnst 8y agoISS isn’t 0g, it’s actually about 0.89g. Even the moon is 0.166g. And that’s without getting super pedantic by saying there’s always some gravity anywhere you are in the universe.
- scrumbledober 8y agoISS is in freefall though, which simulates 0G. Yes technically gravity is almost as strong as on the surface where ISS orbits, but there is no normal force opposing gravity.
- jsjohnst 8y agoActually, the ISS isn’t in “freefall” either. Further, there definitely is a normal force (inertia) opposing gravity too, otherwise without that (and the occasional thruster burns needed due to drag from the atmosphere), it wouldn’t “continually fall and then miss the ground” as it’s normally described in layman terms. There’s plenty of sources to back up what I said previously and here, but this provides a great description of why it’s wrong to say the ISS is in freefall: https://www.quora.com/Is-ISS-considered-to-be-in-gravitational-freefall https://www.quora.com/Is-ISS-considered-to-be-in-gravitation...