Picture Yourself in Orbit: Are You Really Weightless?
An object in orbit is constantly falling, and falling is what causes “weightlessness.” Gravity acts on you even while you are in orbit, and therefore you still have weight. But what is missing is the familiar sensation of weight. Without air resistance, all objects fall at the same rate. Because you and your spacecraft are falling at the same rate, there is no force between you and it to provide a sensation of weight. You feel “weightless.”