What are past values of the Hubble constant and is there an archive for them?

[nick1o2]

Hello, I've been looking round trying to find a history of records, showing the speed of which the universe is expanding? Would this just be the hubbles constant? If so I'm looking for past Hubble constant values. Is there an archive for this? or is there a way to work past Hubble constant's to an exacte year (not right on the dot, but some where near that specific time area)?

 

[mfb]

We have a calculator that can do this.
Knowing past Hubble constant values is sufficient, right, but I think the scale factor is a better value (it directly shows how large the universe was compared to today).

 

[Chronos]

The expansion history of the universe is an unknown asserted on not altogether reliable assumptions. It remains a controversial issue in science, IMO. We do, however, have some good guesses as noted by mfb.

 

[Chalnoth]

The expansion history of the universe is an unknown asserted on not altogether reliable assumptions. It remains a controversial issue in science, IMO. We do, however, have some good guesses as noted by mfb.

The expansion history of the universe is measured. Those measurements aren't all that precise as of now, but I think calling it an "unknown" is significantly understating our understanding of the expansion rate.