Again, because light has a finite speed of propagation, distance and time are equivalent. You are *always* looking back in time, and for extra-solar astronomical objects, the "look-back time" is measured in years.
The Gaia mission has measured millions of stars via parallax out to a distance of several thousand parsecs.
Sticking purely with geometric methods, there are more distant measurements to light echos and expanding supernova ejecta.
Sure, you're looking at the light where it was set in its position of when it was created to see the object. Your last comment doesn't change anything. it's the same problem you imply. Even when you look "back in time" it's still seeing the same thing since the light is the same thing.
Furthermore, scientists don't know if they are having fishbowl effects as stated by Einstein as well. There are many other things to think about like that. Why was the size of the universe apparently 100,000 light years when the universe was only 3 years old, breaking the laws of physics? There are many phenomenon's like this to assume things. And not only that, it's also an assumption that it was... because the theory of everything never been discovered still is a hole in the theory, maybe because there's something to our physical reality that will never explain that part and messes up the entire theory. Then add in the "dark matter" never observed, seen or any remote evidence for it.
Even more, light has the possibility to speed up and slow down. How do you know there aren't different phenomenon's in different solar systems or galaxies or even black holes. Because clearly black holes apparently light cannot escape. Therefore, gravity affects it and can be tremendously affect light if even 186 000 mi/s can be stopped, that's incredible. So obviously it must have the possibility to speed it up possibly like the slingshot used to speed up objects sent to other planets in our solar system. How do you know all the lights travelling through all these planets, suns, galaxies, black holes, etc etc, doesn't do anything or warp what we see? So many assumptions basically these "scientists" invent all kinds of stories just to feel good about themselves.
The speed of light in space is said to be constant
Note that the speed of sound in air varies, the speed of sound in water varies, and the speed of seismic waves in rock varies. But it is said that the speed of light in space does not vary. Search the internet and you can find
lots of articles saying this. See for example Luke Mastin’s article on the
speed of light and the principle of relativity. He talks about the Michelson-Morley experiment, which
“unexpectedly demonstrated that light travels at the same speed regardless of whether it was measured in the direction of the Earth’s motion or at right angles to it”. Mastin also says when light moves from one medium to another, its speed
“can of course change depending on the new medium’s index of refraction, and this “bending” of light is essentially how lenses work”. However he doesn’t mention gravitational lensing. Instead he says regardless of the speed of a light source and regardless of your speed, the
“light still travels at a steady 300,000 km/s, completely contrary to classical physics and common sense”. He also says it was the young Einstein’s genius to explain why. And that in 1905, Einstein realized that
“the whole idea of aether as a medium for light to travel in was totally unnecessary”. It sounds good. Especially since
“the constant speed of light was to become one of the two main planks of his Special Theory of Relativity”. Unfortunately there’s a problem. A big problem. How big? The size of Texas.
1912:
“On the other hand I am of the view that the principle of the constancy of the velocity of light can be maintained only insofar as one restricts oneself to spatio-temporal regions of constant gravitational potential”.
1913:
“I arrived at the result that the velocity of light is not to be regarded as independent of the gravitational potential. Thus the principle of the constancy of the velocity of light is incompatible with the equivalence hypothesis”.
1914:
“In the case where we drop the postulate of the constancy of the velocity of light, there exists, a priori, no privileged coordinate systems.”
1915:
“the writer of these lines is of the opinion that the theory of relativity is still in need of generalization, in the sense that the principle of the constancy of the velocity of light is to be abandoned”.
1916:
“In the second place our result shows that, according to the general theory of relativity, the law of the constancy of the velocity of light in vacuo, which constitutes one of the two fundamental assumptions in the special theory of relativity and to which we have already frequently referred, cannot claim any unlimited validity”.
1920:
“Second, this consequence shows that the law of the constancy of the speed of light no longer holds, according to the general theory of relativity, in spaces that have gravitational fields. As a simple geometric consideration shows, the curvature of light rays occurs only in spaces where the speed of light is spatially variable”.
The last quote is the English translation of what Einstein said in German in
1916: “
die Ausbreitungsge-schwindigkeit des Lichtes mit dem Orte variiert”. That
translates to “
the propagation speed of light with the place varies”. Einstein never did abandon his variable speed of light. The people who tell you that grew up before the Einstein digital papers were online. The general relativity they were taught wasn’t the same as Einstein’s.
You seem to quote one sided science but ignore the rest of the evidence. I wonder why?
