👉 Stereoplanigraph is a mathematical concept in astronomy and astrophysics that describes the relationship between stellar elements, such as hydrogen, helium, carbon, oxygen, silicon, and magnesium. It involves using the principle of spherical symmetry to study stars and galaxies. The term "stereoplanograph" refers to the use of stereographic projection (a method used for astronomical mapping) in constructing a stereoscopic view of celestial objects, which is an important tool in astronomy that helps astronomers to visualize the shapes