Teensy Weensy Universe: Quantum Mechanical Model of the Universe as We Know It

Works on quantum mechanics (astronomy, cosmology etc.) often mention that “the laws of quantum mechanics” don’t apply in the “macro world”. It all depends on what you mean by "macro world". How many atoms constitute the limit, just a couple of them, or a glass of milk, a sizeable house, a city, a continent? Instead, let’s dream big, the whole Planet, maybe our Solar system, our Galaxy, or the Univ...