９１ Future of the Universe【Past and Future】Dialogue with the Universe

９１　Future of the Universe【Past and Future】Dialogue with the Universe

【Future of the Universe】
○About the future of the universe, three main scenarios considered. ［1］

Scenario 1: The universe would continue accelerating forever. Therefore, the Milky Way of solar system would have led to gravitationally combined galaxies with very near. In order to exhaust material gas, there are no longer new stars in these galaxies. There are only leaving remnants of black holes and neutron stars, white dwarf stars.・・・10 ^ 18～10 ^ '25 years after
＜If dark energy is constant＞： geometrically flat universe
ｋ（the geometry of space）＝０
Ω＝１
Ω：the density parameter＝ρ／ρｃ
ρｃ：the critical density＝9×10＾-27（kg/㎥）＝3Ho＾2／8πG
Ho：Hubble's constant
π：the circumference of a circle divided＝3.1415…
Ｇ：Gravitational constant＝6.67×10＾－11 （m＾3 kg＾－1 s＾－2）

Scenario 2: Inflation would slow gradually, over time the expansion will stop. Furthermore, from which the universe starts to shrink, becomes very small and collapses. = "The Big Crunch". ・・・10＾27 years after
＜If dark energy decreases＞：A universe with k>0 is analogous to a two-dimensional life-form on the surface of a sphere.　　　　　　
ｋ＞０、Ω＞１
　　　　　　π is small on large scales, parallel lines will ultimately meet, and the 
interior angles of a triangle add up to more than 180 degrees. 

Scenario 3: The acceleration of the universe may happen so quickly that galaxies, stars, and eventually atoms will be torn apart, in the so-called Big Rip.［2］・・・10＾18～10＾25 years after
＜If dark energy increases.＞：A universe is analogous to a saddle-shape. The universe is infinite. 
ｋ＜０、Ω＜１
πis large on large scales, parallel lines diverge, and the interior angles of a triangle add up to less than 180 degrees. 

○ Future of the universe is due to dark energy.
※Dark energy[3]：
Dark energy is the unknown energy to accelerate the expansion of the universe. It has similar properties as the cosmological term that introduced by Einstein to keep the static state of the universe without collapse by gravity. [4]
Its identity might be the energy of a mere vacuum as well as the cosmological term, or some potential energy (of the scalar field) that does not substantially change even in 10 billion years of time scale.
Others, it can be considered such scenarios that gravity theory which defines the cosmic expansion deviates from general relativity, or remnants of the high-dimensional cosmological such as membrane models have created an effective dark energy.

○According to observations of 2005, Ω is between 0.98 and 1.06. [5]
○In the case of scenario 1, it is necessary to escape from this universe after a few trillion years. [6]

[Expansion of the universe] [7]
○ For expansion of the universe is the expansion of space-time itself, so it is also possible to exceed the speed of light.
○Currently, the observable universe is expanding at 3.5 times of the speed of light. And expansion is accelerating. 
: In the 18 billion light-years distant, the expansion velocity exceeds the speed of light. = We can not observe in the distance from it.
⇒After 2 trillion years it almost becomes invisible but one giant galaxy.
: We are living in special times!

○Outside of the observable universe is not known whether infinite or finite.
○ In any case, the observable universe is smaller than the whole universe, so we can not determine the structure of the entire universe by observation.

⇒ Therefore, in order to escape from our universe, rather than fly, it is necessary to exceed the time and space.

○But above is hypothesis and it is not intended validated. Moreover, the time requires 10 billion years. Don't worry!
○ Hypothesis over the future of the universe is a situation of "anything goes".

☆There is a possibility that the universe can take any form.
☆ In the early universe, it might be another universe looked.

【Future of intelligence】
☆ The important thing for the intelligence is communication between the parallel universe rather than escape from the universe.
☆ Communication between the parallel universe would be done by GAI[8].

【Reference】
1. Chandra X-ray Observatory - NASA's flagship X-ray telescope
http://chandra.harvard.edu/photo/2004/darkenergy/more.html
2. Wikipedia：ビッグリップ（Japanese）
3. School of science the university of Tokyo
https://www.s.u-tokyo.ac.jp/ja/story/newsletter/keywords/25/03.html
4. No.１７ Theory of Relativity
5. Wikipedia：平坦性問題(Japanese)
6. Michio Kaku / New York incandescent classroom " Amazing prophecy of "Theory of Everything;TOE"" 20150403
https://www.youtube.com/watch?v=EWXNFhCuwXI
7. Wikipedia：宇宙(Japanese)
8. GAI ：Growing Artificial Intelligence　No.34、No.39、No.40