The Universe
Prthu Maharaja Milks the Earth Planet
Fundamental Principles of material nature
We can stay here, inside this universe, where we will experience repeated birth and death and the suffering associated with it.
We can also go back home to the spiritual world and take for ever part in Krishnas eternal pastimes but his is only possible trough cultivating pure devotional service and by developing love for God
From the highest planet in the material world down to the lowest, all are places of misery wherein repeated birth and death take place. But one who attains to My abode, O son of Kunti, never takes birth again.
PURPORT
All kinds of yogis--karma, jnana, hatha, etc.--eventually have to attain devotional perfection in bhakti-yoga, or Krsna consciousness, before they can go to Krsna's transcendental abode and never return. Those who attain the highest material planets or the planets of the demigods are again subjected to repeated birth and death. As persons on earth are elevated to higher planets, people in higher planets such as Brahmaloka, Candraloka and Indraloka fall down to earth. The practice of sacrifice called pancagni-vidya, recommended in the Katha Upanisad, enables one to achieve Brahmaloka, but if, in Brahmaloka, one does not cultivate Krsna consciousness, then he must return to earth. Those who progress in Krsna consciousness in the higher planets are gradually elevated to higher and higher planets and at the time of universal devastation are transferred to the eternal spiritual kingdom. When there is devastation of this material universe, Brahma and his devotees, who are constantly engaged in Krsna consciousness, are all transferred to the spiritual universe and to specific spiritual planets according to their desires.
Bhagavad Gita 8.16
HDG A.C. Bhaktivedanta Swami Prabhupada
Fundamental Principles of Material Nature
There are innumerable universes besides this one, and some of them are many, many times greater. It is considered, in fact, that this universe is the smallest; therefore the predominating superintendent, or Brahma, has only four heads for management. In other universes, which are far greater than this one, Brahma has more heads. In the Caitanya-caritamrta it is stated that all these Brahmas were called one day by Lord Krsna on the inquiry of the small Brahma, who, after seeing all the larger Brahmas, was thunderstruck. That is the inconceivable potency of the Lord. No one can measure the length and breadth of God by speculation or by false identification with God. These attempts are symptoms of lunacy. SB 4.8.53
HDG A.C. Bhaktivedanta Swami Prabhupada
Within this universe there is a planet called Siddhaloka. The inhabitants of Siddhaloka are by nature perfect in the yoga achievements, which are of eight varieties: one can become smaller than the smallest, lighter than the lightest, or bigger than the biggest; one can immediately get whatever he likes, one can even create a planet, etc. These are some of the yogic perfections. By virtue of the laghima-siddhi, or purificatory process to become lighter than the lightest, the inhabitants of Siddhaloka can fly in the sky without airplanes or airships. It is hinted herein by Narada Muni to Dhruva Maharaja that by meditating upon the
transcendental form of the Lord and at the same time chanting the mantra one becomes so perfect within seven days that he can see the human beings who fly in the sky. Narada Muni uses the word japah, which indicates that the mantra to be chanted is very confidential. One may ask, "If it is confidential, why is it mentioned in the writing of Srimad-Bhagavatam?" It is confidential in this sense: one may receive a published mantra anywhere, but unless it is accepted through the chain of disciplic succession, the mantra does not act. It is said by authoritative sources that any mantra chanted without having been received from the disciplic succession has no efficacy.
Prthu Maharaja Milks the Earth Planet
The inhabitants of both Siddhaloka and Vidyadhara-loka are naturally endowed with mystic yogic powers by which they not only can fly in outer space without a vehicle but can also fly from one planet to another simply by exerting their will. Just as fish can swim within water, the residents of Vidyadhara-loka can swim in the ocean of air. As far as the inhabitants of Siddhaloka are concerned, they are endowed with all mystic powers. The yogis in this planet practice the eightfold yogic mysticism--namely yama, niyama, asana, pranayama, pratyahara, dharana, dhyana and samadhi. By regularly practicing the yogic processes one after another, the yogis attain various perfections; they can become smaller than the smallest, heavier than the heaviest, etc. They can even manufacture a planet, get whatever they like and control whatever man they want. All the residents of Siddhaloka are naturally endowed with these mystic yogic powers. It is certainly a very wonderful thing if we see a person on this planet flying in the sky without a vehicle, but in Vidyadhara-loka such flying is as commonplace as a bird's flying in the sky. Similarly, in Siddhaloka all the inhabitants are great yogis, perfect in mystic powers.
HDG A.C. Bhaktivedanta Swami Prabhupada
Bg 7.23
Men of small intelligence worship the demigods, and their fruits are limited and temporary. Those who worship the demigods go to the planets of the demigods, but My devotees ultimately reach My supreme planet.
HDG A.C. Bhaktivedanta Swami Prabhupada