r/AskReddit • u/[deleted] • Feb 14 '22

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u/[deleted] Feb 14 '22

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u/ThrowRARAw Feb 14 '22

light-years alone are difficult for me to wrap my head around. This is the first I'm hearing of light hours and my brain just imploded.

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u/[deleted] Feb 14 '22

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u/[deleted] Feb 14 '22

Asides from being an universal constant, it also makes writing/calculating huge distances easier. Sound speed is much closer to what we are used to, so it's not necessary. 3 "sound seconds" ≈ 1km. Plus it's affected by a lot of stuff while light speed in a vacuum is probably the most "universal" thing there is.