Example image of eyePlorer eyePlorer map for 'Pulkovo Observatory': Kilometre M Observatory Pulkovo Heights Russian Academy of Sciences Saint Petersburg Historic Centre of Saint Petersburg and Related Groups of Monuments Astronomer Friedrich Georg Wilhelm von Struve Otto Wilhelm von Struve Alexander Brullov Machine Refracting telescope Aberration Coordinate system Double star Nutation Physical constant Precession Refraction Star Geography Navigation Russia Star catalogue Astrophysics Laboratory Aristarkh Belopolsky Astronomical spectroscopy Fyodor Aleksandrovich Bredikhin Sun Joseph Johann Littrow Spectrometer Telescope Astrograph Astrophotography Celestial pole Zenith telescope Arc (geometry) Arctic Ocean Danube Degree (angle) Geodesic Meridian (geography) Spitsbergen Triangulation Geodesy Hydrography Greenwich Latitude
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