What is Big Rip?
{{cosmology}} In [[physical cosmology]], the '''Big Rip''' is a theory which describes the [[ultimate fate of the universe]]. According to this theory, everything in the universe, even [[spacetime]] itself will be torn apart by the [[expansion of the universe]] until distances between [[Particle|particles]] will become [[Infinity|infinite.]] According to the standard model of cosmology the [[Scale factor (cosmology)|scale factor]] of the universe is known to be [[Accelerating expansion of the universe|accelerating]] and, in the future era it will increase more rapidly. However, this expansion is similar for every moment of time (hence the [[Exponential function|exponential]] law – the expansion of a local volume is the same number of times over the same time interval), and is identified by an unchanging, small [[Hubble constant]] which is ignored by any bound material structures. Similarly in the Big Rip scenario the Hubble constant increases to infinity in a finite time. The possibility of sudden rip [[gravitational singularity|singularity]] occurs only for [[Hypothesis|hypothetical]] matter (phantom energy) but it is unlikely to occur in physical properties.<ref>{{cite book |title=Relativistic Cosmology |url=https://archive.org/details/relativisticcosm00elli |url-access=limited |first1=George F. R. |last1=Ellis |author-link1=George F. R. Ellis |first2=Roy |last2=Maartens |first3=Malcolm A. H. |last3=MacCallum |name-list-style=amp |year=2012 |location=Cambridge, UK |publisher=[[Cambridge University Press]] |pages=[https://archive.org/details/relativisticcosm00elli/page/n627 146]–147 |isbn=978-0-52138-115-4}}</ref> ==Overview== {{main|Future of an expanding universe|Heat death of the universe|Timeline of the far future|Ultimate fate of the universe}} The truth of the hypothesis relies on the type of [[dark energy]] present in our [[universe]]. The type that could prove this hypothesis is a constantly increasing form of dark energy, known as [[phantom energy]]. If the dark energy in the universe increases witho