Mike Helland
Philosopher
- Joined
- Nov 29, 2020
- Messages
- 5,244
We're not talking about how the light behaves on a scale of billions of lightyears, we're talking about how it behaves right here, in the atmosphere and in our telescopes, depending on what object it comes from. Right here on earth, these things don't work, if we're looking at certain galaxies. Right here on earth, our apparatus doesn't work the way we think it does, if it's pointed at certain galaxies. That's not a question of scale, that's special pleading for an arbitrary set of objects.
If all those objects happen to be at least million of light years away, that's a question of domain of applicability.
Nuclear physicists don't worry about Hubble's constant, because the distances involved are too small.
In fact, only cosmologists worry about Hubble's constant because their domain is the only place Hubble redshift appears.