How the Universe Will End
StarTalk・13 minutes read
The universe will eventually die with all matter scattered into space, reaching near absolute zero temperatures, with the expansion accelerating due to dark energy leading to the Big Rip scenario. If the expansion slows down, a potential Big Crunch or Big Squeeze could occur, followed by another Big Bang.
Insights
- Galaxies will expand indefinitely due to the universe's continuous expansion, leading to a future where all matter is scattered into space, reaching near absolute zero temperatures.
- Supermassive black holes in galaxy centers are predicted to take around 10^100 years to evaporate, showcasing the incredibly long timescales involved in the evolution and eventual demise of celestial bodies.
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Recent questions
How long will stars in elliptical galaxies live?
Trillion years before dimming out.
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Summary
00:00
"Galaxies, Black Holes, and the Universe's Fate"
- The universe is expanding, leading to a thinner and less dense state over time.
- Elliptical galaxies have stars that will live for a trillion years before dimming out.
- Spiral galaxies like the Milky Way will also have stars living for a trillion years, but with residual gas to create new stars.
- Galaxies will expand beyond the horizon due to the universe's continuous expansion.
- Black holes will evaporate due to Hawking radiation in around 10^30 years.
- The survival of protons is hypothesized to last around 10^30 years.
- Supermassive black holes in galaxy centers will take around 10^100 years to evaporate.
- The universe will eventually die with all matter scattered into space, reaching near absolute zero temperatures.
- The expansion of the universe will accelerate due to dark energy, leading to the Big Rip scenario.
- If the expansion slows down, a potential Big Crunch or Big Squeeze could occur, followed by another Big Bang.
