Evolution of the Universe

What broad of future awaits our beingness ? We project already mentioned that the calculations Friedman allowed three variances of events . Which of them is the exploitation of the foundation depends on the proportionality of the gravitative energy to energising energy of the expanding study. This ratio skunk be reduced to a ratio of the blockness of matter in the earthly concern to the overcritical engrossment , which we have already mentioned .\nIf the kinetic energy of the real elaborateness dominates the gravitational energy , preventing the paste of , the gravitational pull entrust non carry the break of galaxies and the expansion of the foundation is irreversible . This preference is a impulsive model of the existence called open worldly concern .\nIf the gravitational interaction dominates , the rate of expansion eventually slack to a stop , and hence capture the compression of matter down to retrograde to the initial landed estate of the human beings character ( a position with an infinitely turgid volume tightfistedness) , and then returns a new-fashioned explosion.\nTo the observer, the signal renewal from expansion to concretion will be changing redshift lines of chemical substance elements in the spectra of yonder galaxies on the robust shift . This version of the model is called a closed universe.\nIn the case where the motor of gravity be exactly adapted to the kinetic forces , ie when the expansion does non stop, but its pelt along over clock will persist to zero . later on a a few(prenominal) tens of billions of years after the universes expansion comes a condition that can be called quasi-stationary. theoretically possible and split second of the universe .\nA natural header arises : which of the three options is know in our universe ? The answer to this is for observational astronomy, which should assess the live average density of matter in the universe and to get through the meani ng of the Hubble unvarying ( the expansion fastness of galaxies) . While veritable forecasts of these quantities are non available. Based on current info it seems that the average density of matter in the universe is close to the critical judge , it is either a little more than or a little less. further this little depends on the future of the universe , however, very remote. Hubble continual allows us to estimate the time during which the cognitive operation of expanding universe. It turns out that it is not less than 10 billion and not more than 19 billion years. The close to probable life of the expanding universe 15 billion years1 think . Of all the to a higher place , and the evidence that is not included in the abstract because of its heftiness and mathematical- physical complexity can confidently conclude that the universe evolves , violent processes pickings place in the past, are disaster now and will happen in the future.