Why do astronauts feel light in space?

Answer:

Weightlessness is a sensation experienced by an individual where no external objects are touching one’s body. These sensations are familiar to the state of free fall. During free fall, the only force acting on the body is the force of gravity. As gravity is a non-contact force, it cannot be felt without any opposing force. This is the reason why you feel weightless when in a state of free fall.

Astronauts orbiting in space feel a sense of weightlessness because there is no external contact force in space, pushing or pulling upon their bodies. Gravity is the only force acting upon their body. Gravity being an action-at-a-distance force, cannot be felt and therefore would not provide any sensation of weight.