As I recall it, when Brahman (Hindu Ultimate Reality, known as Parabrahman, meaning "Supreme Brahman") brought forth the creation of the entire universe schema. This Schema contains many Universes, each with its own Īśvara (Ishvara - the Universe concept of Brahman). Īśvara means 3 aspects of the creation process. Brahmā, which is the creation stage of the Universe, Viṣṇu, which is the sustaining of the Universe (how the planets circle the suns, how nature works, how you and I live as mortal beings, and how all this continues and not fall apart), and Shiva, which is the process of the Universe coming to an end through dissolving, through dissolution into a state of matter, a period of rest, before the cycle of the Universe manifestations starts all over again.
So, I would say yes, there are other Earths out there JUST within our own Universe. However, does it mean we could live on such a planet in the other Universes? Are the laws of physics even the same?