Ellipses and ConicsExplores ellipses, conic sections, Kepler's laws, and geometric reconstruction in architectural modeling.
Epicyclic Curves in AstronomyExplores epicyclic curves in astronomy, from ancient Greeks to Kepler, discussing Ptolemy's Almagest and Copernicus' heliocentric system.
Extrinsic Variable StarsCovers extrinsic stellar variability, the history of double stars, microlensing, and extrasolar planet detection.