Vedic scriptures speak of fourteen worlds. Seven of the worlds exist of three higher planes: Bhuloka, the first world or earthly plane; Antarloka, the second world or the subtle, astral plane, and Brahmloka, the third world or the causal plane of God. These three planes can also be viewed as dimensions.
Bhuloka is the dense outermost dimension of being and consciousness. It is the physical world perceived by the senses. Antarloka is the intermediate dimension, the sphere of gods and higher beings, that exists in between the earthly plane and God’s plane. It is a subtle, astral dimension of consciousness. Brahmaloka belongs to Lord Brahma, the Creator. It is both the highest and the innermost dimension. It is pure spirit. Brahmaloka is also known as Karanaloka, the causal plane or as Sivaloka, the plane of Lord Siva the Destroyer who, through destruction, causes a new cycle of creation. To reach this plane is to become entirely absorbed or dissolved in the Divine Spirit and to merge into or become One with the eternal God. To enter Brahmaloka is to end the cycle of birth and death.
The seven lower worlds described in the Vedas are located in Naraka, the netherworld belonging to demons and souls that have become distanced from goodness and God. Naraka is the plane of lower consciousness. Its regions are temporary hells of the mind and the universe. They are places where souls way wander for many ages or for just moments. Ancient scriptures accepted the relativity of time and space. Thus, according to Vedic literature, the duration of any soul’s existence in any world depends upon whether the time experienced by a particular soul expands or contracts and upon the time scales that are in play when souls migrate from world to world.