The Schwarzenchild and the Kerr Metrics for Black Holes give a Ricci = {}.(adsbygoogle = window.adsbygoogle || []).push({});

What does a Ricci Flat mean?

It obliviously has no momentum density or flow because the Stress-Momentum Tensor is also = {}.

It could mean freefall geodesic into a Black Hole?

or it also could be in some sort of stable orbit: circular, ellipse or hyperbolic.

Any suggestions?

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# Ricci Equal to {}

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