Ok I give up. @PeterDonis why say this
You now say this
I explicitly did not equate them at the same time. For the last time I said the expanding Hubble sphere will mean we can see further (than the currently observable Universe) in the future.
The current observable Universe is how far we can see now. That is not how far we will be able to see in the future. Which is what I said. Please point out where I equated the two.
As the Hubble sphere is expanding we will be able to see further in the future. I also know we can see things...
The spectra of the light emitted at the photosphere of the sun , as an example, matches that received at the top of our atmosphere very accurately with small additions from light from the chromosphere and corona.
If there are strong magnetic fields to accelerate free electrons in a plasma then they will emit cyclotron radiation.
Also significant quantities of hot gas (~10% by mass) were missed in galaxies until they were observed in x-rays.
Q1 the spectrum is cut up and stacked. Take the right hand edge of the strip below and attach it to the left hand edge to the one above and so on.
Q2 yes the is normally some signal in the dark bands.
Q3 Yes it remitted but in all directions and not all back to it's original trajectory.
I am not disputing your technical definition but given the baricenter of the Earth Moon system is inside the Earth a Galileo observing from Mars might conclude the moon orbits the earth at least informally. Regards Andrew
You have repeated this several times but I don't understand it. In an Earth centerd model the all solar system bodies orbit the earth in the sense the perform circuits. Yes the are very complex but so is the motion of the moon around the Sun it is not a simple ellipse.
Don't get me wrong I am...