Question: How long is a cosmological decade?

Evan Keane answered on 24 Jun 2011:

I’m not sure I’ve heard of a “cosmological decade” – is it not the same as a normal decade? 10 years?

Maybe you are thinking to something like “epoch” or some other phrase like that? Another possibility is that you are thinking of things that are measured logarithmically, like 0.1, 1, 10, 100, 1000, 10000, … etc. instead of 1,2,3,4,5, … In this case 1 is said to be “one decade higher than” 0.1, and 10 is one decade higher than 1, etc.