this post was submitted on 26 Oct 2025
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Science Memes

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[–] TheLeadenSea@sh.itjust.works 11 points 16 hours ago (5 children)

Year is an incredibly arbitrary length

[–] SpaceNoodle@lemmy.world 1 points 16 hours ago (3 children)

Years measure time, not distance

[–] Spectrism@feddit.org 3 points 13 hours ago* (last edited 13 hours ago) (2 children)

Yes, but it's part of the definition of a light-year, i.e. the distance light travels in a vacuum within one Julian calendar year. Using a year as reference to the distance light travels within a given timeframe is fairly arbitrary. We could just as well use light-months, or light-decades, or some entirely different timeframe as reference.

[–] null@piefed.nullspace.lol 2 points 11 hours ago

Speed = Distance over time.

There are no measurements of speed that won't face that problem.

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