atmospheric-beacon

The Transmuters' alteration of isotopes in Swift's atmosphere serves as a detectable signature intended to attract other civilizations.

1 chapter across 1 book

Diaspora (1997)Greg Egan

Chapter 18

In this chapter, Yatima and Orlando explore the desert planet Swift, observing its unique sulfur-based biosphere and pondering the legacy of the Transmuters, an advanced civilization that altered the planet's atmosphere to signal their presence. They debate whether the Transmuters remain on Swift, have left artifacts, or intended the atmospheric changes as a beacon to attract visitors. The chapter also delves into Yatima's introspective analysis of a nagging mental sensation related to isotopes and enduring signals, hinting at deeper mysteries.