Science and Education Publishing Frontiers of Astronomy, Astrophysics and Cosmology 1 2 2015 09 13 Flat Space Cosmology as an Alternative to Lcdm Cosmology 98 104 EN Eugene Terry Tatum 760 Campbell Ln. Ste. 106 #161, Bowling Green, KY 42104 U.V.S. Seshavatharam S. Lakshminarayana FAAC2015123 10.12691/faac-1-2-3 2015 07 12 2015 08 25 2015 09 13 Flat space cosmology is a recently introduced cosmological model which appears to be a useful heuristic model for correlating current astronomical observations. Based upon a few number of reasonable initial assumptions, our cosmological model universe is always flat and yet it shows a remarkably robust inflationary expansion effect within a tiny fraction of the first second of universal time. Our thermodynamic formula closely resembles Hawking's black hole temperature formula, and yet it appears to correlate closely with cosmic temperature vs. time derivations from experiments in particle physics. Lastly, our model supports recent credible challenges to the current concept of dark energy.