R2=2/k*p
p is the average densityof the matter and k is a constant connected with the Newtonian constant of gravitation
Can anyone explain why this is true, or how Einstein came up with such an equation?
I agree. Also, do you know anything about what is said about the size of the universe? I was reading about how it is tied to the average density in the universe?
Okay, now Albert also talks about how anything can be refrenced as at absolute rest compared to other things. Such as a cup on a table. Everything moves around this cup. But now let's place the cup in the air 100 meters above the table. We still hold true the fact that the cup is at absolute...