world of astronomy ahead

Theoretical scientific explorations of the end of the universe were made possible by the general relativity given by the  Albert Einstein in 1915. here are many possibles outcomes of the theory it defines the universe at the largest structure possible.  Alexander Friedmann came up with many solutions in 1922 and Georges Lemaitre in 1927. one of them suggests that the universe is expanding since the birth of the universe To determine the ultimate fate of the universe the scientists need to gather the data regarding the  critical density of the universe  (the age density of matter required by the universe to stop the expansion).  If in the case the density found to be lower than the critical density then the universe will continue to expand forever, if the density found to be equal to the critical density then the universe expands forever but will decrease it's the of expansion gradually and if the density found is more than the critical density the univ...