Milky galaxy is the owner of the solar system and earth ,not any living beings because nature had chosen us to live here in solar system ,not us . We can mine and sell the valuable goods from planets resources where we had invested to built infrastructures and mine . read more
There's a 1967 international "Outer Space Treaty" in place that more than 102 major nations have signed agreeing that the moon and the planets and their satellites can be visited but no one can "claim" them as territory and defines other legalities of the use of outer space. read more