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A comment on The hammer-feather drop in the world’s biggest vacuum chamber [video]. Parent comment
Versus being inside that an elevator that is being accelerated in interstellar space
This seems like a pretty good explanation: http://www.astronomynotes.com/relativity/s3.htm
Free fall feels like floating Standing still (in the presence of the Earth's gravity) feels like being accelerated.
Versus being inside that an elevator that is being accelerated in interstellar space
This seems like a pretty good explanation: http://www.astronomynotes.com/relativity/s3.htm