Looking up at night I see the galaxy, stars and planets all rotating happily along and wondered, as to the source of rotational energy. As I understand there can be only one source, the Big Bang event. Can I conclude then, that the singularity was rotating at the time of Big Bang ? If so, can I go like: kinetic energy E= ½ I w^2 where E is likely to be a constant? The implications gives me a headace, so help me out here.