There are no luminous stars in the universe. The stelliferous era has come to an end, and we enter the degenerate era . Universal expansion has carried all galaxies out of sight. It is a lonely universe. 10 14-33 years .
All matter is in black holes, neutron stars, white dwarfs, brown dwarfs, and planets.
10 16-20 years . Collisions strip planets from stars, and eject stars from galaxies. Central black holes in galaxies grow. 10 14-20 years . Binary stars spiral together and merge.