Example image of eyePlorer eyePlorer map for 'Astrometry': Astronomy Star Galaxy Milky Way Solar System Star catalogue Aristillus Hipparchus Precession Timocharis Almagest Ptolemy Abd al-Rahman al-Sufi Apparent magnitude Book of Fixed Stars Color Astrolabe Ibn Yunus Eclipse Pierre-Simon Laplace Simon Newcomb Timurid Ulugh Beg Zij-i Sultani Minute of arc Tycho Brahe Istanbul observatory of Taqi al-Din Right ascension Taqi al-Din James Bradley Parallax Aberration of light Nutation Telescope Friedrich Bessel 61 Cygni Arcsec Binary star Charge-coupled device European Space Agency Hipparcos Proper motion Astronomer Celestial mechanics Frame of reference Galactic astronomy Stellar dynamics Observational astronomy Coordinated Universal Time Earth