Complex sentence: Uranographers have historically produced planetary position tables, star tables and star maps fit for amateur and professional observations, nowadays computerized star maps, and automated positioning of telescopes are routinely using huge databases of stars and other astronomical objects.
Split into simpler sentences: Uranographers have historically produced planetary position tables, star tables and star maps for use by both amateur and professional astronomers. More recently computerized star maps have been compiled, and automated positioning of telescopes is accomplished using databases of stars and other astronomical objects.