Example image of eyePlorer eyePlorer map for 'Celestial sphere': Astronomy Concentric Earth Imagination Navigation Radius Rotation Sphere Projective geometry Sky Celestial equator Celestial pole Equator Geographical pole Spherical astronomy Aristotle Celestial spheres Ptolemy Geocentric model Parallax Horizontal plane Celestial coordinate system East West Circumpolar star Meridian (astronomy) Ecliptic Great circle Equation of time Solar time Astronomer Sidereal time Almucantar Ambient construction Antisolar point Armillary sphere Boötes Camelopardalis Capella (star) Centaurus Clime Colure Conformal connection Constellation Ecliptic pole Equatorial mount HD 122430 Hour angle NGC 7424 Orbital pole