“...where does all this fit in a Biblical view?”
I have never heard anyone claiming the Bible is a science textbook. Or that “let there be light” marks the creation of light. The “six” days of creation does not involve the creation of the world. Genesis 1:1 is not part of the six days of creation. The six days involve reclamation and creation of living things.
Do you really believe that there are no more “exotica” left to discover?
A nice point. Genesis 1:5 is taking note that God's division of the light from the darkness, and the naming of day and night, constituted the first day, i.e. the first diurnal cycle, in our terms.
But that leaves the "beginning" when God "Created the heaven and the earth". So what all did that include? I think the question still remains, "Whence atoms?" from a Biblical point of view.
Also, it kind of leaves the "First Day" in the lurch, creation-wise. So from your observation, there were in fact only five days of creation, plus "the beginning".
But of course, this is all just semantics and rhetoric! "It's what it is."