“The galaxy is roughly 13 billion years old.” Now there you go again. Prove it.
carbon 13 dating...
You prove I went there again.
It is proven by an analysis of light waves compared to the curvature of the Universe (which Einstein proved). For certain ligatures to be present would require a timespan which is consistent with the findings of Geology.
Unless and until you can actually understand the underlying mathematics of E=MC^s (which is the endpoint), then you are not qualified to contest the contention.