Welcome to Engineering Commons LLC! A compendium of knowledge, research, and capability on topics of mechanics, astronomy, and horology Education Stern-Brocot Trees Learn More Equation of Time Learn More Eclipse Prediction (Simple) Learn More Eclipse Prediction (Complex) Learn More Making Bevel Gears Learn More Antikythera Mechanism Planetarium Learn More Designing Orreries Learn More Antikythera Mechanism Equation of Time Learn More Pin-Slot Anomaly Correction Learn More Lunar Months Learn More Brute Force Gear Solvers Learn More Sunrise Equation Learn More Astrolabes Learn More Updates Celestis Nova Blog Eclipse Module: Moon Ball Eclipse Module: Cover Cap Eclipse Module: Bevel Gears Eclipse Module: Solar Assembly Eclipse Bracket Assembly Bits and Bobs Capabilities Machining 3D Printing Laser Cutting Woodworking Build Gallery View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize View fullsize