Apologies in advance for the size of the question. Apologies also for English, I read well, but I can not write well so I use a translator. I thank everyone who will answer me.
Guys, I started reading and watching videos about the observable universe (O.U.) and understood the whole part of the expansion of the universe and why the radius of the O.U. is greater than the time of existence of the universe. So, I'm going to put my assumptions that will lead me to doubt.
First, the current distance reflects a much smaller initial distance. For example, the initial distance between an object at the edge of the today's O.U. and our region in the space was something much smaller, in the order of millions of light years. Is that correct?
Second, the point at which the speed of expansion of the universe becomes greater than that of light expresses no meaning for the O.U.; because, as the speed of expansion depends on the distance, if a photon comes out, for example, (and I'm just talking about a number that makes sense to me), from a point to 3 billion light years from us, the photon will reach Earth with a nearly zero "relative speed". I know that classic physics does not aply here but just for the sake of understanding. In other words, it will advance less and less on its journey from the point to 3 billion years to Earth. Is that right? Are my assumptions wrong?
If what I said above is right, then the facts are that: the future limit of the O.U. is somewhere around 60 billion years ago, and the point at which the speed of expansion equals the speed of light (14-15 billion light years of our reference) and the fact that our visible universe today is 45-46 billion years, this are correlated some way? Are these points correlated at all?
If they're not, then what did this paragraph of a FORBES article mean?
You might notice an interesting occurrence: the future visibility limit is exactly equal to the reachable limit (of 15 billion light-years) added to the current visibility limit (of 46 billion light-years). This no coincidence; the light that will ultimately reach us is right at that reachable limit today, after journeying 46 billion light-years since the Big Bang.
Please, give me a light because I do not see the correlation, for me this point that will be 60 billion years is not a point that is 14 billion years from us now, because this point will never reach us, even if a photon comes out with a "relative speed" positive the speed of expansion of the universe will became greater than the speed of the light before this point reach us and then the photon will be traveling forever.