“They typically experience about three times the force of gravity during most of the ascent, and once we reach orbit, when the main engines cut off, they go from that three-G acceleration to zero acceleration virtually instantaneously, and that’s when they become weightless on orbit.”
Once astronauts are in orbit and aboard the space station, they have to keep it going at a certain speed to stay up there.
The ISS is moving at 17,500mph in orbit around the Earth.
The astronauts aboard won’t feel this speed, however, and the only sign they have is looking down to see planet Earth rotating beneath them.
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