The radius of the sun is not exactly 695,700 km. The radius of the sun is approximately 695,700 km. The nominal solar radius, which is and is intended to be a

The radius of the sun is not exactly 695,700 km. The radius of the sun is approximately 695,700 km. The nominal solar radius, which is and is intended to be an approximation, is defined to be exactly 695,700 km.