THIS UNIVERSE HAS 3 SECTIONS:
1st section Is the Heavenly planets
2nd section Is the middle planetary System and the 3rd section Is the Underworld planets.
7 planets cover the 1rst and 2nd section
and our earth Is part of It, this sections are favor by the solar Energy.
The Underworld consist of another 7 planets and they don't get solar light, they aré dark and Lord SHIVA Is their favorite God or deity.