Have you ever used those moving walkways at an airport? If so did you notice the little bit of energy needed to keep going the same speed relative to the ground as you get on? Now imagine an infinite number of them lined up.

You would feel as though you were walking normally but someone on the ground besides the track would see you accelerating and burning calories to do it. That's what happens to photons as they travel through expanding space. They lose energy, shifting frequency towards the red.

@CodysLab Have you ever tried to step on 1 of those when it’s not moving? Most people nearly fall over because their body is so used to automatically adjusting to the new speed that when it’s not moving you trip over your own feet. I watched it happen to hundreds of people in vegas lmao.

@CodysLab In your initial posting are you talking about me attempting to maintain my speed relative to what my feet are on (which is now the walkway)? So yes I even see things fixed to the ground accelerate away from me incrementally faster (similar to the observer's 'measurement' ).

@CodysLab Did you known that there are accelerating walkways ? You stay on the same walkway and it accelerates, either via changing its geometry or having multiple adjoining belts of various speeds ? #Trottoir_roulant_rapide_%28TRR%29?wprov=sfla1" target="_blank" rel="nofollow noopener">en.wikipedia.org/wiki/Moving_wa…

@CodysLab Fun fact: that energy is how they keep going, most walkways are unpowered and require constant use to stay up to speed

@CodysLab Like those rolling roads? Connect cities with them.. 20 lanes each 5 mph faster and the last lane moves at 100mph with restaurants and shops on it.. en.wikipedia.org/wiki/The_Roads…

@CodysLab Isaac Asimov wrote about that in "The Caves of Steel" in 1953. I always wanted to experience a multi-level moving walkway like that.

@CodysLab I never thought of it like that, it makes perfect sense, thank you.

@CodysLab Interesting way to think about it!