query: Can the universe have a definite energy density?
positive_passages.docid: 2377
positive_passages.text: Is the total energy of the universe zero?
negative_passages.docid: 148218
negative_passages.text: How precise must the energies match for absorption of photons?
negative_passages.docid: 123948
negative_passages.text: Why do I not see evidence of discrete energy in the spectrum?
negative_passages.docid: 146039
negative_passages.text: Is it always possible to define energy of a system?
negative_passages.docid: 51684
negative_passages.text: Is it possible that black holes might devour all masses of the universe?
negative_passages.docid: 60787
negative_passages.text: Natural density of solvable quintics
negative_passages.docid: 22682
negative_passages.text: If everything in the universe doubled in size overnight, would it be noticeable?
negative_passages.docid: 61618
negative_passages.text: Could the missing antimatter lie outside the observable universe?
negative_passages.docid: 24003
negative_passages.text: Is the universe fundamentally deterministic?
negative_passages.docid: 102336
negative_passages.text: Size and density of neutron stars
negative_passages.docid: 129980
negative_passages.text: Does potential energy in gravitationall field increase mass?
negative_passages.docid: 115517
negative_passages.text: How could we know that the relativistic curvature of universe is intrinsic?
negative_passages.docid: 152888
negative_passages.text: Schwarzschild Radius of the Universe
negative_passages.docid: 67531
negative_passages.text: Universe being flat and why we can't see or access the space "behind" our universe plane?
negative_passages.docid: 129234
negative_passages.text: Theory that gets rid of dark matter/energy
negative_passages.docid: 78769
negative_passages.text: Assuming that the Cosmological Principle is correct, does this imply that the universe possess an empirically privileged reference frame?
negative_passages.docid: 148838
negative_passages.text: Is the total mass of the universe constant in time?