When Pell's World is discovered in the Tau Ceti system, the fragile economic and political equilibrium is disrupted.
He has spent his entire life in a "simplex" society on Rhys, a satellite of a Jovian planet orbiting Tau Ceti.
This story takes place aboard a multi-generational spaceship travelling from Earth to a planet orbiting Tau Ceti with the goal of establishing a colony.
In that game the UESC Marathon is in orbit around Tau Ceti's fourth planet, where a colony is being formed.
Gregory Lawrence, an ordinary, nondescript scientist, is dismayed to learn that the famous interplanetary explorer Sir Erik Koskelainen has returned to Earth from the planet Krishna in the Tau Ceti star system, and is to stay with the family of Lícia Ferreira, the girl he has been courting.
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Severn, accompanied by Gladstone's aide Leigh Hunt, farcast to Tau Ceti Center, but instead arrive on a world that is an apparent analog of 19th century Earth and, in particular, the city of Rome, where the historical Keats died.