I always wondered about the following:
An astronaut floating inside a spaceship that is far from Earth or any other other planet will experience true zero gravity because there is negligible gravitational pull coming from any planet nearby. Is this correct?
But an astronaut floating inside the ISS is experiencing artificial zero gravity (I use the term “artificial” because it is not the consequence of the lack of a gravitational pull — the Earth is still there), because the ISS is constantly free-falling towards the earth while at the same time speeding around it. Is this correct?
What I mean is, isn’t the zero gravity experienced by an astronaut inside the ISS similar to what a person would feel if they were standing inside an elevator that was free-falling for a long period of time? Or more precisely, isn’t it similar to the artificial zero-gravity created by those big zero-g airplanes? And we somehow seem to forget that when we look at those ISS videos.
Or am I completely wrong?