1. Introduction: Astrology, Extraterrestrial Life and Astrobiology.-
2. Celestial Influence as an Aid to Pluralism from Antiquity to the Renaissance.-
3. William Gilbert: Magnetism as Astrological Influence, and the Unification of the Terrestrial and Celestial Realms.-
4. Johannes Kepler: A New Astronomy, Astrological Harmonies and Living Creatures.-
5. Influence and/or Inhabitation: The Celestial Bodies between Kepler and Newton.-
6. Influence and Inhabitation Opposed.-
James E. Christie is a historian of early modern science and cosmology. His particular areas of interest include the history of astrology, the history of the 'plurality of worlds' philosophy, and the longer history of astrobiology and the extraterrestrial life debate. He received a PhD in Cultural and Intellectual History from The Warburg Institute, London, in 2018, with a dissertation focusing on the relationship between theories of celestial influence and celestial inhabitation from the classical period up until the early eighteenth century.