Astrology

Planet size
Terra Nova's diameter is within one percent of Earth's (R&A prologue).

Moons

 * Hecate
 * Eris
 * Bellona

Constellations

 * The Leaping Maiden (R&A chapter 1).
 * The Smilodon (R&A).
 * The Pentagram (R&A).

Citations:
 * R&A = The Rods and the Axe.