The Collaborative International Dictionary of English v.0.48:
Astrolatry \As*trol"a*try\, n. [Astro- + Gr. ? service, worship: cf. F. astrol[^a]trie.] The worship of the stars. [1913 Webster]WordNet (r) 3.0 (2006):
astrolatry n 1: the worship of planets or stars [syn: astrolatry, worship of heavenly bodies]