９ The size of the Universe【What is the Universe？】Dialogue with the Universe
・About the size of the Universe with the Milky Way is not known yet well, but it is said that the range of the spherical diameter of about 92 billion light years(ly) in diameter. ・・・0.92×１０ˆ１０
・Distance to the Andromeda Galaxy(the nearest galaxy) is about 2.5 million ly ・・・2.5×１０ˆ６
・By the way, the disk of the Milky Way galaxy is about 100 000 ly in diameter. ・・・１×１０ˆ５
・Distance to the nearest star ・・・４×１０ˆ０
・Solar system is about 100,000 ly in diameter. ・・・0.6×１０ˆ−３
・Distance to the Sun from the Earth ・・・1.6×１０ˆ−５
・The Earth is about 13,000 km in diameter. ・・・1.4×１０ˆ−１２
・Human height is about 1.7m. ・・・1.8×１０ˆ−１６
(The length of the DNA in the cell of the human is 1.8 m.)
・The size of human cells is about 15μm. ・・・1.6×１０ˆ−２１
・The sizeof hadron (proton, neutron) ・・・1×１０ˆ−３１
・The length of "string" contemplated in the superstring theory
☆If the reference unit of the size of the universe is the speed of light, the size of the parallel universe is about １×１０ˆ５１ly.
☆It may be there are the 82nd power piece of 10 universe in the parallel universe.