0 the state of having or appearing to have no weight; the fact of not being affected by gravity (= the force that makes things fall to the ground): --
Serpent is not enclosed and allows you to experience weightlessness three times as you descend.
The body receives a variety of conflicting signals from the visual, somato-sensory, and vestibular organs in weightlessness.
The stationary bike had long been a staple of shuttle flights to allow exercise that countered the effect of weightlessness on the muscles.
Graveline is the author of ten professional publications and reports on biological deconditioning and weightlessness countermeasures.
Engineers and astronauts used this underwater facility to simulate the weightlessness (or zero-g) environment of space.
Around apogee the craft experienced about 3 minutes of weightlessness.
In weightlessness during spaceflight, integrating the sensory inputs and coordinating motor responses is harder to do because gravity is no longer sensed during free-fall.
In the absence of this force, a person would be in free-fall, and would experience weightlessness.
