Figure 1. The lookback time and the proper distance as a function of the combined gravitational and cosmological redshift

From

A Combined Cosmological and Gravitational Redshift Supports Electron-Positron Annihilation as the Most Likely Energy Source of the CMB

Jarl-Thure Eriksson

International Journal of Physics. 2019, 7(1), 16-20 doi:10.12691/ijp-7-1-3