...don't look to a 2,500-yr-old practical philosophy about how best to liberate one's mind - however brilliant and still relevant in its own scope - for a cosmology. Look to science for cosmology. Science doesn't claim to have the answer to liberation; Buddhists shouldn't makes claims on the structure and origins of the universe. I only mention this because of a few Buddhist "leaders", whom I won't name, who have made statements on cosmology based on their readings of the Pali canon. Doing so only sets one up for the same criticism that theists are now experiencing. I don't see any benefit from credulity.
Perhaps you could clarify what you are talking about in regards to Buddhist cosmology? Are some taking it to be literal? It was always my understanding that most of it was meant to be as symbolic of mental states beings can find themselves in both in physical life and beyond