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A comment on If the universe is 13.8B years old, how can we see 46B light years away? (2018). Parent comment

Re:If the universe is 13.8B years old, how can we see 46B li... by Zenst on Saturday December 07, 2019 @11:40AM (#21731128)
Interesting ratio of 1:3.3141210374639769452449567723343 not exactly Pi.

But then that expansion ratio may of been different over time, but it is a bit like sampling the second hand on a clock in a photo and working out the entire motion and workings of the clock - at least on the scale of the data/measurements we have and the age of the universe. Currently we are still not 100% sure when midnight was, but as always moving in the right direction.

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Re:If the universe is 13.8B years old, how can we see 46B li... by Retric on Saturday December 07, 2019 @12:12PM (#21731313)
We have more recent data on closer objects. It’s a sequence of thin shells that expands as you go backward in time, or a 3D light cone aimed backward in 4D space time. https://en.m.wikipedia.org/wiki/Light_cone
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