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5 years ago or so and 5 or 6 hours in the future
Thanks! What is the unite?
z values refer to red/blueshifts and correspond to time periods in the universe’s history. In reality thats a vast oversimplification but given the way the comic is using z values, those two time periods are what they were intending to convey
Ok, cool that makes sense. I have a rough idea what redshift is, I just didn’t read the title. Thanks!
I enjoy that explainxkcd explains not only the science but the mechanics of human dating.
i didnt know redshift had an actual meaning i thought it was just a fun name for a linux program
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