This stone slab with the carvings of a planisphere, a chart of constellations, was made in 1396 by 11 astronomers including Gwon Geun and Yu Bang-taek under the orders of King Taejo.

The Projection Of Earth’s Poles Into Space…. Celestial Equator: The Imaginary East-West Line That Bisects The Celestial Sphere Into Northern And Southern Halves. The Projection Of Earth’s Equator Into ...