Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Microgravity refers to environments where there is very little gravitational force acting on objects relative to what is experienced on Earth's surface. In these conditions, objects appear weightless or experience extremely weak forces.
Related terms
Zero Gravity: A term often used to describe the complete absence of gravitational force. It is not entirely accurate since gravitational forces are still present but significantly reduced in microgravity.
The state of an object or person moving under the sole influence of gravity with no other forces acting upon it. Astronauts in orbit around Earth are essentially in a continuous state of freefall.
Space Adaptation Syndrome (SAS): A collection of symptoms experienced by some individuals during their transition from Earth's gravity to microgravity. Symptoms can include nausea, dizziness, and disorientation.