Our earth does not revolve around the sun rather the sun revolves around the earth Just as the Moon makes a complete revolution in 27.3217 days at a subtly small angle of 5.14° with the ecliptic, similarly the Sun makes a complete revolution in 365.2564 days at a subtly small angle of 1.25° with the ecliptic. And this tropic is located at an angle of 23.44° with the earth's equator.