👉 Polyphemus is a celestial body in the constellation of Cygnus, which has been referred to as a "double planet" due to its two moons, Titan and Triton. This celestial body was first mentioned by Ptolemy, who described it as an object that orbits around another planet or moon. However, the term "polyphemous" is now used to describe any celestial body that appears twice in the same year or has a similar appearance throughout its orbit.
