👉 "Heliofugal" is a term that refers to a phenomenon in which an object, such as a satellite or a spacecraft, has no mass and experiences a force of gravity due to its motion. This force is called "helios" (the Greek word for light) and is often referred to as "gravitational". The heliocentric model of the solar system suggests that planets are stationary relative to the sun, and that they move in circles around the sun.