[tv_techie]

I’m not even going to pretend I understand this, but I have a question. If two things left the point of the singularity in opposite directions traveling at the speed of light for 13.8 billion years, wouldn’t they now be 27.6 billion light years apart?

[FredZarguna]

In four dimensional space-time, all objects have been moving away from the singularity in different directions since the beginning of spacetime.

And to answer your question: Yes, objects can be further from each other than their distance to the beginning of spacetime, and those objects essentially cannot see each other, they are beyond each other's event horizons.

[RedHeeler]

Absolutely not! Well, maybe. The speed of light is only determined by relative points of reference. Some points of reference, maybe outside of relative relationship. Dimensional enthusiasm is not paid much attention, by well compensated “one size” standardist blowhards.

[Bob434]

[[I’m not even going to pretend I understand this, but I have a question. If two things left the point of the singularity in opposite directions traveling at the speed of light for 13.8 billion years, wouldn’t they now be 27.6 billion light years apart?]]

Depends on how much headwind they run into

[LibWhacker]

I'm going to say no. Though I should warn you, I'm always wrong.

Remember Einstein's deal was that the speed of light is the same for all observers.

A photon can be an observer.

So if photon1 watches photon2 move directly away from it, photon1 will measure photon2's speed to be 'c', not 2c, and after 13.8 billion years, photon1 will therefore say photon2 is 13.8 billion ly away, PROVIDED space is not expanding. But that's just it, space is expanding, and not at a constant rate either.

Now, I've glossed over a lot of things. Why? Because I'm always wrong and always gloss over things I don't understand so that I don't screw up my standing.