%0 Journal Article %T Upsilon Constants and Their Usefulness in Planck Scale Quantum Cosmology %A Eugene Terry Tatum %J Journal of Modern Physics %P 167-173 %@ 2153-120X %D 2024 %I Scientific Research Publishing %R 10.4236/jmp.2024.152007 %X This paper introduces the two Upsilon constants to the reader. Their usefulness is described with respect to acting as coupling constants between the CMB temperature and the Hubble constant. In addition, this paper summarizes the current state of quantum cosmology with respect to the Flat Space Cosmology (FSC) model. Although the FSC quantum cosmology formulae were published in 2018, they are only rearrangements and substitutions of the other assumptions into the original FSC Hubble temperature formula. In a real sense, this temperature formula was the first quantum cosmology formula developed since Hawking¡¯s black hole temperature formula. A recent development in the last month proves that the FSC Hubble temperature formula can be derived from the Stephan-Boltzmann law. Thus, this Hubble temperature formula effectively unites some quantum developments with the general relativity model inherent in FSC. More progress towards unification in the near-future is expected. %K Quantum Cosmology %K Hubble Constant %K Planck Scale %K Upsilon Constant %K Flat Space Cosmology %K Black Holes %K CMB Temperature %K ¦«CDM Cosmology %K Quantum Gravity %K Unification %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=131071