- #1
RobinSky
- 112
- 0
Hi
I got into some thinking recently and I could really need some help unsolving these mysteries currently going on inside my head.
First of all, the universe is expanding, is this a fact?
2nd, if now the universe is expanding, and we know this by looking at objects further away from us because we see them moving away from us, and the further away, the faster they move away from us (right? I know there are more proofs than this one I just barely mentioned).
But, let's say now we are looking at the earliest galaxies of the universe we have seen, we see they moving away from us extremely fast (faster than nearby galaxies), but, they were as said very far away from us when the light left the galaxy (and today they are even further away), is this how fast they were moving away from us when the photons left that galaxy?
I might though have mixed up this thinking with something else, my other piece of mind says that we know the current expansion rate of the universe due to math/physics, like some kind of inversed "math/engineering"-thingy?
I hope you understood what I'm trying to ask, shortly:
Current expansion,- light from far away,- expansion now?- expansion then?
The way we see galaxies moving away from us now, is that how they were moving away from us then?
I should stop! Thanks in advance
I got into some thinking recently and I could really need some help unsolving these mysteries currently going on inside my head.
First of all, the universe is expanding, is this a fact?
2nd, if now the universe is expanding, and we know this by looking at objects further away from us because we see them moving away from us, and the further away, the faster they move away from us (right? I know there are more proofs than this one I just barely mentioned).
But, let's say now we are looking at the earliest galaxies of the universe we have seen, we see they moving away from us extremely fast (faster than nearby galaxies), but, they were as said very far away from us when the light left the galaxy (and today they are even further away), is this how fast they were moving away from us when the photons left that galaxy?
I might though have mixed up this thinking with something else, my other piece of mind says that we know the current expansion rate of the universe due to math/physics, like some kind of inversed "math/engineering"-thingy?
I hope you understood what I'm trying to ask, shortly:
Current expansion,- light from far away,- expansion now?- expansion then?
The way we see galaxies moving away from us now, is that how they were moving away from us then?
I should stop! Thanks in advance