13.1: Observing Last updated Sep 27, 2020 Save as PDF 13: Planetarium, Astronomy Club 13.1.1: Introduction Page ID29745 Lumen LearningLumen Learning ( \newcommand{\kernel}{\mathrm{null}\,}\) 13.1.1: Introduction13.1.2: The Telescope13.1.3: Observatories and Early Astronomy Clubs13.1.4: The Planetarium13.1.5: Current Astronomy Clubs