Brahma lives in different dimension or a planet? | Brahmaloka - House of the Creator

This is how Multiverse looks, with each universe having its own creator. 
This is beyond Multiverse.

Brahmaloka (Sanskrit: ब्रह्मालोक) and more often Satyaloka (Sanskrit: सत्यलोक)' world of truth'.

Man's knowledge is as mini as a grain of sand in this universe. The whole cosmos is centralized toward humans.

Whatever is outside is inside us, and whatever is inside is also outside. Corresponding to the seven centers inside, there are seven realms of being in the whole universe. In Sanskrit they are called Bhuloka, Bhuvarloka, Svarloka, Maharloka, Janaloka, Tapoloka, Satyaloka. 

I am not asking you to think about why these lokas exist. I am just asking you how to visualize these lokas. How to explain to someone new to Hinduism what a loka really is?

Science is not yet developed to describe all kinds of truths that pervades this magnificent and ever mysterious universe. Asking scientific explanations for everything is like asking a toddler how to solve a differential equation. – Rickross

Strictly speaking, that answer is not "scientific." Science believes in verifying claims through our senses, i.e., experimentally. That lokas correspond to chakras in our body is true, but science has no methods to verify that.

Scientifically speaking, lokas are planets located in different galaxies. Our earth is in the Milky Way. Other lokas like Satya loka, Rasatala, and others are situated in other galaxies. – Pinakin

My personal thought on Loka is that it could be a planet, moons (chandra loka), or stars (Surya loka). So you could say a place with civilization. – Sisir

Satyaloka is said to be situated next to Brahmaloka, and sometimes it is said to be a universe in itself and sometimes said to be on top of the universe. The creator, Brahma, with his consort, Saraswati, lives there. 

I find Satyalok appealing due to various reasons:

1. According to the Purans, Satyaloka vibrates at the highest frequency to anything that will ever be known. Longevity - 311 trillion human years (100 creator years). His current age is 50 years 1st day which is 155.5 trillion human years which is the current age of our universe. God-Level: 100%

2. The Age of truth: There is no concept of right and wrong. People don't even need to communicate and rarely speak in the event of misunderstanding. Inclusive population.

3. Life longevity - 17.28 creator secs which is 1.72 million years.

The lifespan of humans - is 1,00,000 years to 10,000 years (start of Yuga to end of Yuga ).

4. There is no painful death in Satyaloka, as we know death on this planet. But at the end of Brahma's lifetime, the entire universe, including Satyaloka, is consumed by cosmic fire, and at that time, the inhabitants have to move on.

5. By all practical considerations, life in Satyaloka is free from all problems, infirmity, and anxieties and with a lifetime so inconceivably long by human perception so much that one could say virtually eternal.

However, although the prospect of reaching Satyaloka may be rather appealing, the Vaikuntha planets are much higher above Satyaloka. The ultimate destination that one could crave is Goloka Vrindavan, the eternal abode of Lord Sri Krishna, reaching where one would never return to this material creation again.