Deborah Tomkins: Aerth [2025] paperback

Magnus lives on Aerth, which is currently moving into
an Ice Age, with a strange virus limiting the population.
When the planet Urth is discovered, he vows to
become an astronaut and travel there, but on arriving
he finds it hot, crowded, corrupt and violent, despite it
being initially welcoming. Slowly Magnus realises he
will not find what he's looking for, but there seems no
way back.

Aerth is a story about migration, climate, conspiracy
theories and interplanetary homelessness.