Sanskrit: The moon, the sun and higher planets are called svargaloka. There are three different statuses of planets: higher, middle and lower planetary systems. The earth belongs to the middle planetary system. Bhagavad-gita informs us how to travel to the higher planetary systems (devaloka) with a very simple formula: yanti deva-vrata devan. One need only worship the particular demigod of that particular planet and in that way go to the moon, the sun or any of the higher planetary systems.