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What Is Microgravity and How Is It Different From Zero Gravity?

The article clarifies that microgravity describes the near‑weightless condition experienced when a spacecraft and its contents are in continuous free fall, leaving only minute residual accelerations, whereas “zero gravity” is a popular but inaccurate label implying gravity has vanished. It notes that even at the International Space Station gravity is roughly 88‑90 % of Earth’s surface value, and the residual forces can range from 10⁻² g down to 10⁻⁶ g depending on the platform. The piece also outlines how microgravity impacts human physiology, experimental science, and the growing commercial market for short‑duration weightlessness. Finally, it stresses that precise terminology matters for research design, mission planning, and public communication.