End of Universe ; Vishnu says

last day i saw a prog in natgeo
"How universe ends?"

it presented 2 theories
one says
the universe expands expands expands
everything splits and expands
at last
molecules splits to atoms
and no more molecules exist
only isolated atoms
it will be cold and dead
thats the death of universe
then somehow an atom gets excited
it collides with another
thus a point of hier gravity created
everything pulled into it
and everything joins
then another
BIG BANG
thats one theory
the next says
universe expands to a limit
then its energy runs out
and falls back
thus contraction of universe
contracts contracts contracts
to a
Singularity
then another
BIG BANG
new universe
these are the 2 theories they speak of
the first one got more weightage
since the expansion of universe is accelerating

second one happens only if it decelerates

it is determined by the amount of dark matter and dark energy we have
if dark matter is more, then the contraction theory comes true.else the expansion.

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