actually, since the universe will go black in a few million years, i believe that when it does that, it will pretty much cave in on itsself? i mean, theres no more mass being produced, only decaying, so why not
estimated to be between 10
19 - 10
20 years is when there are no non-neutron/black dwarf stars left
stars are still forming right now still but the two most accepted theories are the big crunch or an endless void and endless void is more depressing but i dont see where all the matter goes after a black hole evaporates according to stephen hawkings theory
If the sun increases in its heat output like it has been at a constant rate, within 500 million years its aproximated all life on earth will not exist and it will certainly be a huge desert planet if not something like Venus.
In 5 billion years, the sun will have became a red giant and burnt earth along with venus and mercury ending the existence of every lifeform we know of, but all that would really be left at the point after the "desert earth" would be small organisms like bacteria and such living underground as they have for most of the existence of earth.
its aproximated in 7.5 billion years the sun would of became a white dwarf.
even the oldest white dwarfs still radiate at several thousand degrees Kelvin, so the universe hasn’t been around long enough for black dwarfs to exist.. yet. But give the sun another 1 trillion years or so, and it should finally become a cold black dwarf.
in 3 trillion years, there wont be any radiation left over from the big bang and it will appear as the universe is static and unchanging, as by this point it will not appear that the universe is creating new galaxies, as it will appear to be going faster than the speed of light, which you cant see anything traveling faster than light.
In about 100 trillion years, everything will be a cold black dwarf, some neutron stars and black holes will exist aswell left over from when stars did exist
now its aproximated that after this, in 1e+30 years, (thats 10000000000000000000000000000
000000000000 years, long time) all regular matter would have decayed, protons become unstable after a long long period of time, and thats only if it wasnt consumed by super-blackholes
all thats left will be a ton of black holes floating around fighting eachother to become the most super black hole
And after this, in 1e+100 years, get ready for a long long number (10000000000000000000000000000
00000000000000000000000000000
00000000000000000000000000000
00000000000000 years)
all black holes would evaporate, leaving the only thing left in the entire universe, pure radiation, and the occasional elementary particles such as neutrinos and photons (we can argue later if photons are considered particles), and the temperature of the entirety of the universe will be just above absolute zero.
this is where there is either an endless nonexistant void once known as our universe, or a big crunch happens from wherever all that matter went after the evaporation of black holes
disclaimer: this is all a hypothetical formulated by a lot of cosmologists, astrophysicists, and astrologists
now my question is, what if the background radiation from the big bang is actually the radiation left over by black holes from a pre-existing universe?
