200 Billion Light Years from Home

Sixteen very diverse people from entirely different time zones simultaneously collapse in a coma and wake up in a featureless dome, that can make itself transparent when it wishes. They are on a highlights tour of the known universe, beyond the last days of planet Earth, beyond the Milky Way, heading, as we all are, for the end of the universe. And when they get there, they are going to stop it from happening.