7 Different kind of heavens

Bhurloka, Bhuvarloka, Svarloka, Janaloka, Maharloka, Tapoloka and Satyaloka.

In these seven planetary systems, which are also known as the subterranean heavens [bila-svarga], there are very beautiful houses, gardens and places of sense enjoyment, which are even more opulent than those in the higher planets because the demons have a very high standard of sensual pleasure, wealth and influence. Most of the residents of these planets, who are known as Daityas, Dānavas, and Nāgas, live as householders. Their wives, children, friends and society are all fully engaged in illusory, material happiness. The sense of enjoyment of the demigods is sometimes disturbed, but the residents of these planets enjoy life without disturbances. Thus they are understood to be very attached to illusory happiness.

Even those who attain the highest material planets or the planets of the devas 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 Krishna bhakti, then he must return to earth. Those who progress in Krishna bhakti 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 the devastation of this material universe, Brahma and his devotees, who are constantly engaged in Krishna bhakti, are all transferred to the spiritual universe and to specific spiritual planets according to their desires.