Sagot :
In ancient times, astronomers thought that all celestial objects – the
Sun, Moon, planets and stars – orbited around the Earth in a series of
crystal spheres. But as modern science developed, astronomers were
better able to understand our place in the cosmos. They discovered that
all the planets, including the Earth, actually orbit around the Sun.
why planets revolve the sun? its because due to the force of gravitation, the gravitational force of the sun is very strong that keeps them in their orbit. the planets orbit the sun in the same plane, the elliptical paths (axis) are not complete sphere, they are slightly oval-shaped elliptical. if the planets orbited the sun in a complete sphere, it would always be the same distance from the sun.