Both occur, I agree, but they are two separate different aspects of the same phenomenon (that space-time is curved by mass).
Slowing down of time has nothing to do with red-shift, I believe, since photons are not emitted by oscillator that is slowed down but are just portions of energy that...
Here http://curious.astro.cornell.edu/question.php?number=278 I see the following:
Do I understand right that mentioning slower time passage at the bottom of the tower here is slightly inappropriate? Red-shifting of the light here is totally accounted for by photons loosing some energy...
I got my answer here: http://physics.stackexchange.com/questions/38779/why-the-red-shift-of-distant-galaxies-is-considered-to-be-the-effect-of-expandin
And it's pretty much "Finally of course you'd have to explain how come Hubble's Law holds." which means that by explaining galaxy red-shifts as...
I found some cool material on the subject: http://www.astro.ucla.edu/~wright/cosmo_01.htm
Calculators for things I don't understand included. :-)
I don't understand the part that says:
especially: so v = cz + ...
because I'd rather think that v = (2cz+cz2) / (2+2z+z2) which gives you...
I tried that. Failed. So I asked.
I'm very thankful for your answer (even more if the subject is brought here that often).
Is there some maximum doppler redshift that can be achieved by shooting object away from us at almost the speed of light and we observed galaxies that exceed this...
Why it's not explained just by Doppler redshift caused by faster movement of those galaxies billions of years ago when that light was emitted?
Would the speeds of the galaxies necessary for Doppler redshift to explain all of the observed galaxies redshift be unreasonable or is there something...
Does presence of mass cause space-time curvature?
Is expansion of universe change of space-time curvature?
Chalnoth said that when you put in the observed movements of galaxies and masses to Einstein Field equations you can calculate tensor that indicates expansion of space.
Why do you...
So expansion of space-time is not necessarily the cause of expansion of universe, but just side effect of galaxies running away from one another?
How can such small things as galaxies cause expansion of vast voids between them? Isn't space-time in intergalactic void basically flat?
Why do...
We observe farther galaxies with higher redshifts.
How can we be sure that this is due space itself expanding?
How do we know that this is not just Doppler shift of galaxies running away from us at higher speeds long time ago, that got lowered (decelerated by gravity of matter in the...
Good that you clarify because I didn't get that from what you wrote. What I understood was more like 'Is it morally wrong to ignore him until he goes away, because he obviously doesn't know or get anything?' :-)
I think you are right and I am going to do just that. If you can think of some...
Sorry. I didn't notice that coordinate system and frame of reference are used interchangeably so I thought that these are two different things. I thought coordinate system was just that (Cartesian, polar, hyperbolic, etc.) and frame of reference was some set of coordinates moving with some speed...
In SR what is simultaneous depends on frame of reference.
You say that in GR what is simultaneous is not only dependent on frame of reference but also on which set from equivalent sets of coordinates you pick to describe events that you are interested in?
Does frame of reference and set...
If I understood it to the extent you do I wouldn't be asking questions about it here.
Purpose of my questions is broadening my understanding. And I already understand few things I have not understood before so from my point of view your responses are far from being pointless, and I'm very...
But won't this last signal arrive to Earth after infinite Earth time? - "classically and in principle" whatever you mean by that
So you are saying that in Earth frame of reference travel to event horizon of a black hole takes less than a day? That's completely opposite to what I understood...
Thank you. I think that's sufficient amount of keywords for me and also an interesting information that I was not aware of.
I mean that in probes message there is 12:47:05 PM year 13.7 bilionth since big bang while on Earth there is 12:01:03 PM year 18 billionth.
Being unable to detect...