Posted in quotes 20000 stars transition every sec ond from being reach able to being unreachable June 16, 2015 http://www.forbes.com/sites/ethansiegel/2015/06/08/dark-energy-renders-97-of-the-galaxies-in-our-observable-universe-permanently-unreachable/?linkId=14788497 The expansion of the Universe is a key feature of the Big Bang cosmology and is a generic property of the universe we inhabit. Since Edwin Hubble”s observation in 1929, which led to the discovery of the expansion of the Universe, astronomers try to understand the behavior of it. Several models were created up today which shall explain the past and the future expansion: A decelerating universe reaches its current size in the least amount of time. The universe could eventually contract and collapse into a “big crunch” or expand indefinetly. A coasting universe is older than a decelerating universe because it takes more time to reach its present size and expands forever. An accelerating universe on the other hand is older still. The rate of expansion actually increases because of a repulsive force that pushes galaxies apart. Views : 1,148 Related Articles Posted in quotes Decapitalising our minds: the key to addressing climate change Posted in quotes Famous individual quotes Posted in A.I. quotes Louis Rosenberg – The profound danger of conversational AI Posted in quotes Meditation – Andy Puddicombe – All it takes is 10 mindful minutes Posted in quotes Lukasz Laniecki – Is it okay to hate a family member? Posted in quotes Eat, fast, live longer by Michael Mosley Posted in quotes The salary ignorance that keeps many workers underpaid Posted in quotes Reality is an illusion: Donald Hoffman explained | Annaka Harris and Lex Fridman