BIRTH OF THE UNIVERSE[BIG BANG ORIGIN]

THIS UNIVERSE WAS BORN IN A BIG BANG.SPACETIME AND MATTER BEGAN WITH THE BIG BANG.TO BEGIN WITH THE UNIVERSE WAS A TINY,HOT,DENSE FIREBALL WHICH CONTAINED ALL THE ENERGYOF THE PRESENT UNIVERSE.THE SEED FROM WHICH THE UNIVERSE GREW COULD BE A BUBBLE OF SPACETIME OF ONE PLANCK LENGTH ACROSS,BORN AN’’AGE’’OF ONE PLACK TIME.IN THE FIRST SPLIT SECOND,IT EXPANDED RAPIDLY UP TO THE SIZE OF A GRAPEFRUIT,IN THE PROCESS CALLED’’INFLATION’’.THEN AS ENERGY WAS CONVERTED INTO THE KIND OF MATTER WE KNOW TODAY,MAINLY HYDROGEN AND HELIUM,THEEXPANSION SLOWED DOWN.THE UNIVERSE IS STILL EXPANDING,BUT EVER MORE SLOWLY,15 BILLION LATER.ONE THEORY SAYS THAT GRAVITY WILL KEEP SLOWING THE EXPANDING UNIVERSE DOWN,UNTIL IT EVENTUALLY STOPS EXPANDING AND STARTS TO COLLAPSE BACK INTO ITSELF.ALL PROCESSES OF EXPANSION WILL RUN BACKWARDS,ENDING IN A BIG CRUNCH IN WHICH MATTER IS TURNED BACK INTO ENERGY AND SQUEEZED OUT OF EXISTENCE AS WE REACH A spacetime POINT CALLED’’INITIAL SINGULARITY’.This occurs when the curvature index k= plus one.IN this model the cardinality of set of galaxies is ‘’COUNTABLY finite’’.AND WHEN THE CURVATURE INDEX k=ZERO,THE UNIVERSE SHALL BE EXPANDING AT A MARGINAL RATE SUCH THAT THE CARDINALITY OF THE SET OF GALAXIES IS COUNTABLY ‘’INFINITE’’iff the universe is non-empty.And when the curvature index k=MINUS ONE,THE CARDINALITY OF SET OF GALAXIES IS ‘’UNCOUNTABLY INFINITE’’iff the universe is non-empty.AND THE UNIVERSE SHALL BE HAVING AN ACCELERATED RATE OF EXPANSION .[critical comments].(ref:see page 60’’TIME and SPACE’’byMARY AND JOHN GRIBBIN).