👉 Perigon is a term used in astronomy, specifically in the field of astrophysics and celestial mechanics. It refers to the point on the orbit of an object that is closest to the Sun, also known as the "Sun's position" or the "center of mass." The perigon is named after the Greek word for "center," peri means center and gon is a Latin term meaning "circle." Therefore, it's like a circle of fire around the Earth.