Isotropic means that there is no direction preference. Isotropic pressure would be that a body does not have a pressure gradient. However the static...
Once more: The equation for orbital speed inside a uniform density sphere is different from the equation for orbital speed outside a uniform density...
Read my source where the formula is different inside and outside of the mass distribution: Orbit Speed Inside and Outside a Mass Distribution, grav....
This and the next post look like mainstream physics - light traveling in straight lines from 2 sources to a central observer. As you seem to know and...
Your source says that is wrong. You cannot use the orbit speed for an object outside of a sphere inside a sphere: Some general formulae for circular...
That is a "only one solution" misconception that I addressed in a later post, grav. This is the first of several static spherically symmetric perfect...
Let us assume that you have a correct "H". The issue with this post is that you are deriving the metric internal to a body. So introducing a "locally...
This looks like the interior Schwarzschild metric which "is an exact solution for the gravitational field in the interior of a non-rotating spherical...