What is not open for debate is that the universe is at least 10 - 15 billion years old. And what is not open for debate is that the speed of light has been established and verified at 186,000 miles per hr.
When you make assertions like the above, what else is there to assume? Hence my question "What are the Big Bang assertions/assumptions about the speed of light and the mass of the universe in the first 1 second of the "event"?" Reckon how old the universe appeared 1 year after this "explosion". In my mind, this causes significant concern for the assertions about the universe's "age".
The scripture mentions 10 times of the LORD "stretching" out the heavens, to wit:
Isaiah 45:12 It is I who made the earth and created mankind upon it. My own hands stretched out the heavens; I marshaled their starry hosts.
I reckond that he stretched out the streams of light from "distant" stars in the same way, if not at the same time.
And why couldn't that have taken several billion years.
It is you who are making assumptions.
You state that known facts are not true because your interpretation of Genesis conflicts with reality.
As for the quote "Isaiah 45:12 It is I who made the earth and created mankind upon it. My own hands stretched out the heavens; I marshaled their starry hosts."
Where does that give any time paramters?
Facts are facts. Adjust your interpretation of the bible to match reality, else you'll be delusional.