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Hello Everyone,
Back when Einstein was formulating General Relativity his equations just could not predict a static universe. I have read that they actually predicted an expanding Universe. Later Friedmann derived an equation from GR that would explain how an Expanding Universe would evolve. This was a very unpopular opinion at the time, I think they didn't even think there was more than one galaxy in the universe, this caused Einstein to add a Cosmological Constant such that it would result in a static universe. Now my understanding of General Relativity is quite elementary so I am curious as to these equations would predict an expanding universe without the need for some sort of 'Big Bang' to set the universe into motion
I am also curious as to the role of radiation density in an expanding universe.
Thanks in advance,
Back when Einstein was formulating General Relativity his equations just could not predict a static universe. I have read that they actually predicted an expanding Universe. Later Friedmann derived an equation from GR that would explain how an Expanding Universe would evolve. This was a very unpopular opinion at the time, I think they didn't even think there was more than one galaxy in the universe, this caused Einstein to add a Cosmological Constant such that it would result in a static universe. Now my understanding of General Relativity is quite elementary so I am curious as to these equations would predict an expanding universe without the need for some sort of 'Big Bang' to set the universe into motion
I am also curious as to the role of radiation density in an expanding universe.
Thanks in advance,