Just it is funny for me.
ex) [Lim]'s 3 bunkerings was astral to both the fan of Bean and [Lim].
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Some scientists introduced ether to explain the speed of light is constant, not infinite. In other words, we cannot add speed to the speed of light because the speed of light is kind of limited speed of all objects. Some guys explained this with the pressure or change of density of ether. Anyway it's wrong.
I am so sorry to type in Eng. I really want to type in Kor. You are really interested in cosmology!
Dark matter doesn't interact with light. You know all objects attract by gravity. Ether has not been introduced for gravity.
Actually, by Einstein, matter makes spacetime curved. We can measure the curvature of our universe, while we can guess the total mass of the universe( we can observe some density of the universe with telescope.)
Above two observation(and calculation by theory) collided. They are contradict each other. If we assume dark matter, it would be done, but we cannot observe this, so scientists called it dark matter.(we cannot see it)
Dark matter is the subject which lots of physicists are currently researching. They also know a little.
Actually, big bang phenomenon is just one solution of Einstein gravtiy equation(It has many solution. like x^2 =1 has two solution).
However, scientists can modify it with cosmological constant, and they don't know what value does cosmological constant have.