Not Saying Anyone is Wrong But...

I have questions which, perhaps, someone out there with education and knowledge can help me with.

One question has to do with the size and age of the universe. And it is simple, I think, though the answer might not be. 

Let me preface the question with some background information: Light travels at a speed of 186,282 miles per second (per Einstein and testing). Using that, one can determine distance from a light source. I accept this as True. Using that, one presumes the age of the universe can also be calculated and they claim it to be close to 14 Billion years old.

My question is: how big is the universe and how do we know that this is correct?

If it is ~14 billion light years to the point of origin (let's call this the Big Bang point) then it should be approximately 28 Billion light years from end to end (simple math... Radius * 2 = Diameter). But that is theoretical, isn't it... the distance across? And how are we measuring it? Is it the distance from Earth to the Point of Origin as radius and, if so, then that would presume that our planet is at the edge of the universe. Obviously, that can't be so. Or, at least, not logically. We exist in the Milky Way galaxy, on one of its "arms" and in a "sea" of other galaxies. We have designations for most of these and I have seen maps of the Milky Way galaxy showing (approximately, I am sure) the solar system's location in it. But, thinking logically (or at least trying to), I do not know where that is in the universe. How far is our galaxy from the outer edge of the universe? Do we even know? I would suspect that we can see light that originates in that direction and, presumably knowing the speed at which that point is moving away from us, we can determine the farthest perceptible objects in that direction from us. However, what if the edge of the universe is too far away for us to perceive the light from its outermost object?

No one seems to answer that question, no one seems to think it's important.

No one but me, apparently. 

Tomorrow: Back to gender musings.