A relative told me about a book they read when they were young; about from 1980 through to 1995.
People live in a dome on Earth (must be after some apocalyptic event) and they think they are the only survivors. They are unable to venture outside, so cannot see what the world is like.
A man commits a crime, and is given the ultimate penalty: he is shot out of the dome high into the atmosphere, to die.
At the end of the story, the man looks down at the Earth as he is shot out and sees similar domes all over the countryside... then dies.
Any ideas what this story could be? My relative is almost certain it is a book, but it could possibly be a long short story or novella.