Sorry, I did post this in an individual thread, but there aren't too many vivid dates describing the death of the universe in the "Big Chill" scenario. I wish to change that.
Sorry. I did go much past a trillion.
1 billion years from now. The sun's ever increasing luminosity has now twiced earth's average surface temperature. Dropping carbon dioxide levels have caused photosynthesis to cease, killing all multicellular life. The whole planet will feel like it's in an endless barren wasteland.
1.3 billion years from now. The surface temperature now exceeds boiling point, which soon means means the entirety of Earth's oceans will begin to boil down to the bottom and evaporate in the form of steam, releasing a plethora of carbon dioxide and toxic water vapor to condense into thick clouds in the atmosphere that immediately shroud the planet. A violent greenhouse effect is now being created, ever increasing the temperature. Lightning storms the world as molten sulfuric acid rains on mountains.
2 billion years from now. Our nearest galactic satellites, the Magellanic Clouds, will spiral and be ripped into our own galaxy as the stars begin to merge.
2.3 billion years from now. Earth's solidifying liquid outer core has long ago caused plate tectonics to halt. Now it has frozen completely, erasing the planet's magnetic field as days and nights are no longer available.
2.8 billion years from now. The surface temperature now reaches 302 degrees Fahrenheit. All life dies.
3.5 billion years from now. The sun's ever increasing gravitational pull will cause the inner solar system to rile into chaos, increasing the risk of colliding planets. Earth's surface temperature has now skyrocketed to roughly 1,350 degrees Celsius, or 2,490 degrees Fahrenheit, hot enough to liquefy stone.
4 billion years from now. Andromeda is on a long collision course with our own Milky Way. Eventually it will pass by our own galaxy, scattering stars and planets, but soon gravity will begin to seize the two galaxies pulling both into one large elliptical galaxy, Milkdromeda. Our solar system will be pushed into the frigid outer reaches, but will eventually soon die.
5.4 billion years from now. The sun has now run out of helium produced in its core and it beings to produce it in its shell instead. It is now in its red giant phase, and continues to expand.
7.9 billion years from now. The sun has now reached its maximum radius, 110 million miles or roughly 256 times its present size. Mercury, Venus, and our own planet will be swallowed, engulfed in flames and destroyed, and Mars will be totally ripped asunder due to a gravitational battle between Jupiter and the Sun. The habitable zone has now extended into Saturn's orbit, making few of its moons potentially habitable for the time being as few ice moons could have entire oceans of liquid water of their surfaces.
10 billion years from now. The sun has cast its shell to form a planetary nebula. Inside is a locked up white dwarf star, a stellar corpse smaller than Earth in diameter, nut hundreds of thousands more denser since it still consists of fifty-four percent of the sun's mass. There is scarcely and residual heat emitted from this object and the temperature of the solar system will plummet incredibly, but even this will pass on to no heat at all.
14.4 billion years from now. The sun has finally lost all of its heat, and would cool into a black dwarf, nothing but a frigid degenerate ball of crushed, dead stellar matter.
20 billion years from now. One potential date when the universe could possibly end. If the quantity of dark energy significantly increases, then the expansion will accelerate, ripping the universe apart from superclusters, stars, planets, and even basic atomic matter. Though latest research has suggested that the speed of the universe's expansion will still likely be stable, and that the universe will linger in a cold, unprecedented death.
100 billion years from now. The expansion has now been so forever that galaxies beyond our local Virgo supercluster are now no longer visible.
150 billion years from now. The cosmic light horizon has now shifted to absolute zero, also no longer being visible.
450 billion years from now. Our Local Group is being pulled into its much bigger Virgo supercluster at merely nine million miles and hour. During the early stages of galaxy formation, it was fifty-three million light years away. Now it has reached the center, and all of its other small clusters are pulled into one mega-massive elliptical galaxy hundreds of millions of light years across. Dark energy continues to move the supercluster galaxies farther apart from each other, with our nearest neighbor now being at least twenty billion light years away.
800 billion years from now. The Milkdromeda galaxy begins to lose its star forming nebulae, as all the dwarf stage pass on their blue dwarf stage.
1 trillion years from now. Gas clouds in all galaxies will begin to run out of fuel, gradually diminishing the production rate of stars.
4 trillion years from now. Our nearest red dwarf stellar neighbor Proxima Centauri, which has been shining for longer than our own sun, will finally lose all of its heat and would become a white dwarf star.
10 trillion years from now. The fate of all red dwarfs is finally here. The universe will be filled with new stars, but as time passes, even these will die and there will lurk nothing but eternal darkness.
20 trillion years from all. The end of all spinning planets. All axes decay as all planets become tidally locked with their stars. All those sunrises and sunsets you see today - gone.
100 trillion years from now. All those main sequences, and even the longest-lived burning stars would die to a point of no return. The universe has now become a cosmic graveyard littered with stellar remnants - white, brown, and black dwarfs, neutron stars and black holes.
1 quadrillion years from now. With the last star deceased, the universe has now become a peaceful place. Black holes sail through the ocean of darkness, eating or ejecting stars that get too close. Surfaces of planets will be icy, lifeless, and gloomy, drenched in this quiet environment with starless skies above.
10 quintillion years from now. White dwarfs are now the most luminous objects in the universe. Not as bright, but frequent brown dwarf collisions that create red dwarf for short periods of time will occur.
100 quintillion years from now. If not devoured by the red giant sun, Earth's orbit would finally decay and would plunge back into the sun, as other planets will be ejected into the frigid abyss, never to return.
1 sextillion years from now. Dwarf stars will be the only output for surviving life forms in the universe, which will likely be as microbes, although harsh severe conditions will cause evolution rates to be close to zero.
1 septillion years from now. All the white and brown dwarfs would have finally lost all of their heat and would become black dwarfs.
1 decillion years from now. The universe's temperature begins to fluctuate, creating small warm heat bubbles, to where any lying rogue planet would be able to sustain multicellular life for the time being. But eventually, atoms will decay themselves.
10 undecillion years from now. The end of basic atomic matter. All protons, quarks, and neutrons would begin to disintegrate into electrons, positrons, and neutrinos if they don't fall into black holes.
1 duodecillon years from now. This process is now complete. Even the last material survivors, neutron stars and black dwarfs would evaporate away into nothingness.
1 tredecillion years from now. The Black Hole Era will now begin, as black holes are now the last crucial fundamental building blocks of the universe.
1 sexdecillion years from now. Black hole mergers begin. Smaller black holes will lose orbits and would fall into the larger one, causing the larger one to gain quintillions of solar masses. If not, the smallest black holes would begin to evaporate away.
10 unvigintillion years from now. Loss of Hawking radiation will cause black holes with around three solar masses to rapidly evaporate away, freeing subatomic particles.
10 septenvigintillion years from now. The end of all waves slower than the visible light spectrum. The temperature would have cooled to an occasion where radio waves would not be able to travel through any medium.
1 novemvigintillion years from now. The last chance of escape. Supposed an advanced civilization has the ability to resize molecular structure. They would have the ability to open a miniscule gateway to a mirror universe that has a younger age where they can prosper.
10 trigintillion years from now. Even though all the material continues to dilute away, dark energy still continues to dominate the far expanses of the universe. By this time, the expansion would be so incomprehensible that it wouldn't even be calculable to even the most intelligible being.
10 untrigintillion years from now. Time has now longed so incredibly, that entropy would now completely erase the longest standing black hole with trillions of solar masses. The only survivor in the following is a massive sea of particles of radiation - photons, swaying all at different directions and temperatures.
10 duotrigintillion or more commonly, 1 googol years from now. The universe's temperature has now cooled to absolute zero, which is the lowest temperature possible. All the photons freeze and immobilize, erasing the material universe. The "Dark Era", as it is called, will start afterwards and will consist of nothing but pure vacuum.