Cosmological SF

We watched Jim Al-Khalili (see image) on the beginning and end of the universe. This made me think about which works I classify as "cosmological sf."

(i) There is a lot that I have not read.

(ii) Both The Triumph Of Time by James Blish and Tau Zero by Poul Anderson feature an intergalactic journey and the end and beginning of a universe.

(iii) In The Avatar by Poul Anderson, a T-machine enables a spaceship to visit different galaxies at different stages of cosmic history and eventually to arrive at a monobloc.

(iv) I also include works that show stellar processes, e.g.:

Sol has become a red giant in the "Further Vision" of HG Wells' The Time Machine;
Anderson's "Lodestar" and Mirkheim deal with the stellar synthesis of heavier elements.