earthbound reference frame

The Earthbound reference frame is a perspective or coordinate system that considers Earth as a fixed point of reference. In this frame, positions and movements are measured relative to Earth's surface or center, allowing us to understand locations, directions, and motions of objects on or near Earth — like satellites, airplanes, or the stars' apparent movement. It’s useful because Earth provides a stable, familiar reference point, making it easier to describe and analyze the behavior of objects relative to our planet.