In Hinduism, the concept of parallel universes or multiverses is not explicitly described in ancient Hindu scriptures. The ancient Hindu texts, such as the Vedas and the Puranas, primarily focus on philosophical and cosmological discussions but do not provide detailed scientific descriptions of multiple universes.
However, it is important to note that Hinduism is a complex and diverse religion with a wide range of beliefs and philosophical interpretations. Some modern interpretations and speculative ideas within Hindu philosophy and cosmology do touch upon the concept of multiple universes.
One such concept is the idea of Lokas or different realms within the universe. According to some interpretations, these Lokas represent different dimensions or planes of existence, each with its own inhabitants and characteristics. For example, the Bhuloka is considered the earthly realm, while the higher realms like Swarga or Deva Loka are associated with celestial beings and gods.
While these Lokas can be seen as different realms within our universe, they are not necessarily parallel universes in the sense of separate cosmic entities with distinct laws of physics. They are often depicted as interconnected realms within the cosmic order.
As for the question of how one can go to these realms or universes, Hindu scriptures describe various paths and means to attain higher realms or spiritual states. These typically involve spiritual practices, meditation, and following certain rituals or disciplines. However, it's important to understand that these descriptions are often symbolic or allegorical, emphasizing spiritual progress and enlightenment rather than literal physical travel to different universes.
It's worth reiterating that the concept of parallel universes or multiverses as understood in modern scientific terms is not explicitly discussed in ancient Hindu scriptures. Hinduism primarily focuses on spiritual and philosophical aspects of life rather than scientific cosmology.