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 time as reference.
On addition, we could measure year by a different planet. To the universe, choosing the time it takes the Earth to move around the sun one time is pretty arbitrary. Why not Mars? Or why not a totally different star system?
Spectrism@feddit.org 2 months ago
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 time as reference.
Cethin@lemmy.zip 2 months ago
On addition, we could measure year by a different planet. To the universe, choosing the time it takes the Earth to move around the sun one time is pretty arbitrary. Why not Mars? Or why not a totally different star system?
null@piefed.nullspace.lol 2 months ago
Speed = Distance over time.
There are no measurements of speed that won’t face that problem.