I honestly don't know that much about it. Here is a description -

Cosmotheism is a religion which positively asserts there is an internal meaning and purpose in life and in the cosmos. There is an essential unity, or consciousness that binds all living beings and all of the inorganic cosmos, as one. And what our true identity is this: we are the cosmos, made self-aware and self-conscious by evolution. Our undeniable human purpose, is to know and to complete ourselves as conscious individuals, and also as a self-aware species, and thereby to co-evolve with the cosmos towards total and universal awareness, and towards the ever-higher perfection of consciousness and being.