This paper introduces the Space-Density Displacement (SDD) Model, proposing that black holes displace the 'space property' of atoms into the vacuum, driving universal expansion. The model explains Dark Energy as the pressure of this displaced space and solves the Hubble Tension by linking expansion rates to local mass activities. It further defines time as an internal property of mass and posits a cyclic universe." This version concludes that the Universe has no definitive beginning or end. It exists in an infinite cycle of displacement and absorption.
Govinda prasad Kandel (Fri,) studied this question.