- #1
Passionflower
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In GR there is made a clear distinction between a vacuum region and a non-vacuum region as one is handled by the Ricci tensor and the other by the Weyl tensor.
But is reality so black and white? And when do we realistically talk about dust and when about fluid?
So the inside of an average star, what is the percentage of vacuum?
But is reality so black and white? And when do we realistically talk about dust and when about fluid?
So the inside of an average star, what is the percentage of vacuum?