Question Summary:
Is it true that there are seven worlds like the one we live in? And do humans like us live there? Do they have ambiyaa as well?

Question Detail:

Is it true that there are seven worlds like the one we live in? And do humans like us live there? Do they have ambiyaa as well?

Answer :

In the name of Allah, Most Gracious, Most Merciful
Assalaamu `alaykum waRahmatullahi Wabarakatoh
In the first verse of Sura Fatiha, Allah Taala says, “All praises is due to Allah Rabbul Aalameen”. Allah refers Himself as Rabbul Aalameen (the Lord of the Worlds).
It is understood from this word, Aalameen meaning world, that there is more than one world. The verse does not say how many worlds there are. However in another verse, Allah says, “Allah is He who created seven skies and likewise the earth.
It is understood from the Ahadith that Rasulullah (صلى الله عليه وسلم) met different prophets at different skies during the incident of Meraj. 
And Allah knows best
Wassalam
Mufti Ebrahim Desai

Darul Iftaa, Madrassah In'aamiyyah