>>11700308Redshifting is not distance, it is speed. The Doppler effect. Redshifting occurs when something is moving away from us, blueshifting is when something is moving closer to us. This is why we say Andromeda is on a collision course with the Milky Way: it's more blue/violet/higher frequency than what we would expect.
More redshifting is not, in itself, related to how far away it is. More redshifting means it's moving away faster, which PROBABLY means it's further. (Assuming objects A and B, both starting travel at "about" the same time, at "about" the same distance from C, object A traveling faster than object B both relative to object C, object A will be further away.)
As for shifting out of visible light, light is part of the electromagnetic spectrum. A person couldn't "see" it because our eyes aren't built for it, but instruments set to see infrared (or "see" lower frequency radiation) could.
If we are unable to detect something, it is more likely because it started further away from us than other objects, and the light, or radiation as part of the electromagnetic spectrum in general, hasn't gotten to us yet, or otherwise hasn't been detectable.
I may as well note: distance changes how bright or dim something appears - how able we are to detect it. Inverse square law, etc.
