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