system
Given the following post, respond as if you're commenting on Reddit:
human
Where in the universe are we? (and other related questions)

If we set the origin of the universe at the point of the big bang. Presuming we know where the origin point is. Where are we relative to it? Is the universe a sphere? since I presume there is no resistance to it's expanding. Are we near the center,edge or middle of that sphere? is there anything in the center or does matter only exist along the surface area of the sphere? Can we figure it our using like red/blue shift or something?
gpt
We're at the centre of the observable Universe, which has a radius of around 13.7 billion light years.  We can't be any more specific than that.

It's not strictly correct to consider the Big Bang as the spatial origin (like a central point) of the Universe, since the Big Bang was the beginning of **every point in** the Universe.