From sky +‎ lore.

skylore (usually uncountable, plural skylores)

1. (puristic) The study, knowledge, or science of the sky and its apparent components (heavenly bodies, constellations, etc.).
   • 1981 June, Astronomy, →ISSN, skylore, page 35, column 1:

     Modern astronomy has explained why this part of the sky is so sparsely starred and revealed facts which show that Arcturus is even more distinctive than previously thought. And there is even some twentieth-century skylore about this star.

   • 1984, Guy Gavriel Kay, The Summer Tree, →ISBN, →OCLC, page 41:

     Now, though, for long years now, since Amairgen learned the skylore and founded the Council of the Mages, the power drain in their magic runs only through the mage’s source, and the avarlith is not touched.

   • ibidem, page 173:

     “Be that as it may, just before morning there came a fourth visitation to Amairgen, and this one was from the God, from Mörnir, and it was beneficent, for it taught to Amairgen the runes of the skylore that freed the mages ever after from the Mother.

   • 1996, Geoffrey Cornelius, Paul Devereux, “Teotihuacán”, in The Secret Language of the Stars and Planets: A Visual Key to Celestial Mysteries, London: Pavilion, →ISBN, page 153:

     The orientation of Teotihuacán was cosmological, its axial plan evolving from a ritual cave whose configuration matched the skylore — the mythologized astronomy — of the times.

   • 2018 November 13, Edred Thorsson, chapter 12, in Rune Might: Secret Practices of the German Rune Magicians, Rochester: Inner Traditions, →ISBN, Timing, page 140:

     The most important investigator of Germanic skylore was Otto Sigfrid Reuter (1876–1945). He then embarked on a more intensive study of the Germanic peoples and their star- and skylore. We still await the full redevelopment of a Germanic skylore (astronomy) and starlore (astrology), for which pioneering work was done by Robert Zoller in the Rune-Gild.

• starlore