Nine Homeworlds
The phrase 'nine homeworlds' is Níu Heimar in Old Norse. Relating to another term heima meaning 'home' or 'homestead', the term heimr means a 'place of abode' in the sense of a homeland or 'region', or in a larger sense a 'world'. These nine homeworlds include the earth, called Miðgarðr, the homeworld where humans as a family dwell.
Read more about this topic: Norse Cosmology