Zero Gravity
Zero gravity refers to the state or condition in which there is no apparent force of gravity acting on a body, such as a spacecraft or an astronaut, resulting in a feeling of weightlessness. In space, zero gravity is achieved when an object is in freefall and is orbiting around the Earth or another celestial body. This state of weightlessness has significant effects on the human body, including changes in bone density, muscle mass, and cardiovascular function. In astronautical engineering, zero gravity is a critical factor in the design and operation of spacecraft, as it affects the behavior of fluids, materials, and equipment. Engineers must consider the effects of zero gravity on the performance and stability of spacecraft, as well as the safety and comfort of astronauts during space missions.
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