関連ワード:  is elon musk founder of spacex    is elon musk ceo of spacex    is elon musk owner of spacex    is elon musk still ceo of spacex    is elon musk sole owner of spacex    is elon musk the only owner of spacex    is elon musk ceo of tesla and spacex    elon musk founder of spacex and tesla    is elon musk the ceo of spacex    is elon musk part of spacex