 #1
Angela G
 62
 19
 TL;DR Summary

Hello!
I was solving an exercise about the Hubble constant and the Hubble parameter and got that the Hubble parameter ( at t = 1/2 t_0, where t_0 is the actual age of the universe) is 8/9 smaller than the Hubble constant. So my question is if we should consider this difference and talk about the Hubble parameter instead of the Hubble constant? In other words: Does the "Hubble constant" variate with time?
(P.S! this is an open question, feel free to answer)