- #1
eoghan
- 207
- 7
It is said that in the case of a homogeneous and isotropic spacetime, the surfaces of homogeneity must be orthogonal to the tangents to the world lines of the isotropic observer.
Does this mean that the isotropic observers are always at rest in a surface of homogeneity?
Does this mean that the isotropic observers are always at rest in a surface of homogeneity?