１０ What Constitutes the Universe【What is the Universe？】Dialogue with the Universe

１０　What Constitutes the Universe【What is the Universe？】Dialogue with the Universe

(1) Substance・・・・・4.83% by weight of the universe
・Heavy elements •　　：0.03%
・Neutrino　　　　　　：0.3%
・Stars　　　　　　　　：0.5%
・Hydrogen・Helium　：4%
(2) Energy・・・・・・・ 0.17% 
(3) Dark matter ・・・ 26.8% 
• The dark matter can be detected by observing the gravitational.
(4) Dark energy ・・・ 68.3%
・Dark energy is hypothetical energy to explain the accelerated expansion of the universe and result of observation that the the majority of the mass of the universe is unknown identity.
(Hawking suspects that it is vacuum energy.)

ref>“Planck reveals an almost perfect Universe”.

※ The universe is expanding, but the dark matter and substances act as a brake against the expansion of the universe in order to attract each other by gravity.