[berathebrain]

All I know about 19.5 degree angle is that it's an angle of star tetrahedron, when it is inside the sphere, the points of star tetrahedron touch the surface of the sphere at 19.5 degree. But the question is where on Earth is that 3 points of start tetrahedron above equator and 3 points below equator? At that points should be the greatest energy.