Thomas Weibel Thomas Weibel Observing the lunar cycles has been relevant to humankind for millennia, and already in ancient Babylon their fundamental laws were discovered: 19 solar years correspond to almost exactly 235 synodic lunar months or full cycles of moon phases. This so-called Metonic cycle provides a framework for building lunisolar calendars by synchronizing the solar with the lunar year. The Metonic cycle can be visualized using the machine metaphor, and turned into a virtual online and even a mechanical, 3D-printable moon phase calculator. This article has been double-blind peer reviewed. PDFDocument eng 2026-06-16T10:59:50.522479102Z Experimentelle Archäologie Experimental archaeology ÖFOS 2012 -- GEISTESWISSENSCHAFTEN (6) -- Geschichte, Archäologie (601) -- Geschichte, Archäologie (6010) -- Experimentelle Archäologie (601025) ÖFOS 2012 -- HUMANITIES (6) -- History, Archaeology (601) -- History, Archaeology (6010) -- Experimental archaeology (601025) Astronomie Sternkunde Himmelskunde Astronomy Mondphase Mond / Phase 3D-Druck 3D-Print 3D-Drucken 3D Printing Binder Jetting 3D-Druckverfahren Wissenschaftsgeschichte 02.01 Geschichte der Wissenschaft und Kultur Allgemeine Werke und Philosophie -- Wissenschaft und Kultur allgemein -- Wissenschaft und Kultur allgemein: Allgemeines -- Geschichte der Wissenschaft und Kultur astronomy moon lunar phases metonic cycle 3d printing science history 23643017 b application/pdf http://creativecommons.org/licenses/by/4.0/