👉 In physics, heliography is a phenomenon where light waves are refracted or bent by an object's surface. It occurs when a ray of light passes through a material that reflects it back at its source. This bending of light can be observed in the form of a helioscope, which shows a rotating disk or a circular pattern on the surface of a planet or other celestial body. In the context of astronomy and space exploration, heliography is often used to study the effects of gravity
