Alas, the top hits for "timescape" refer to a sci-fi book. But timescape wiltshire leads to a nice presentation: https://www.nottingham.ac.uk/physics/document

Alas, the top hits for "timescape" refer to a sci-fi book. But timescape wiltshire leads to a nice presentation: https://www.nottingham.ac.uk/physics/documents/talesoflambda/wiltshire.pdf https://www.nottingham.ac.uk/physics/documents/talesoflambda... And without math, https://en.m.wikipedia.org/wiki/Inhomogeneous_cosmology https://en.m.wikipedia.org/wiki/Inhomogeneous_cosmology