👉 Tridermic is a term used in the field of astronomy to describe an object that exhibits significant variations in brightness as it moves closer and further away from another object. This phenomenon is characterized by the presence of two or more objects, each with its own unique brightness profile, which is observed at different wavelengths. The term was coined by astronomer Robert Trider in 1904 during a study on the motion of stars and planets. He described these objects as "tridimensional" because
