Introductory·Model

Gravity and Circular Orbits

How can gravity simultaneously pull an orbiting body inward while the body continually misses the surface?

Build the conceptual model first, then test the same idea through the linked scientific representation or tool.

Two different learning journeys: Quick builds one memorable mental model. Deep rebuilds the concept as a structured scientific argument with precision, mathematics, assumptions and connections.

Quick story · start here

How can gravity simultaneously pull an orbiting body inward while the body continually misses the surface?

Build the conceptual model first, then test the same idea through the linked scientific representation or tool.

picture firstname the ideause it once

Scene

See the scene

Build the picture before the terminology.

The gravitational parameter GM combines the central body's mass with the gravitational constant and determines local gravitational acceleration and ideal circular-orbit speed at a given radius.