Bless the sun?

This seems a wonderful & fertile example of aggadic creativity, but I wonder how I am supposed to react to the bracha when (a) I don't think it makes sense to speak of the sun returning to the same place in the heavens, given that the heavens have changed considerably since creation; and (b) we can't date creation to any particular date, and certainly not the zero-date postulated by Chazal. So do I:
1. Quash doubts nusach ha-ortodoksyah?
2. View it as a pretty metaphor albeit astronomically impossible?
3. Give up astronomy, especially belief in a universe billions of years old?
4. Or maybe just omit shem ve-malchut?