Who owns Android ?

Gathered illuminati; seems to be a curious silence on the question who 'owns' Android; at the heart of an $A8billion dispute between Oracle and Google; which has re-surfaced this week -To what extent can open source software be 'owned' ? -To what extent can a particular distribution of a piece of open-source software be 'owned' ? -To what extent can API's be 'owned' ? regards Rohan McLeod