I am not allowed to disclose the meaning of Gayatri Mantra. It’s the great secret. You have to go and ask the person who initiated you into this mantra – it could be your father or another Guru.
The descriptions of the 7 worlds are given in the Bhagavatam. Swamiji’s explanation of Moola Bhagavatam is already being telecast on ETV and via SGS Posts. If you listen to it daily, you will learn about the various higher planetary systems such as Suvarloka, Bhuvarloka and also the lower planetary systems (netherworlds like Patala) that exist in the universe. These are various names given to the various planes of existence. There are many different types of mountainous regions in these different planetary systems that house varied forms of life. Sri Swamiji is narrating Bhagavata in Telugu. Please follow these episodes.
(Q&A Session, 12 Mar 2017)