Abstract: Nightfall is an astronomy application for fun, education, and science. It can produce animated views of eclipsing binary stars, calculate synthetic lightcurves and radial velocity curves, and eventually determine the best-fit model for a given set of observational data of an eclipsing binary star system.
Nightfall comes with a user guide and a set of observational data for several eclipsing binary star systems.
Credit: Wichmann, Rainer
Site: https://www.hs.uni-hamburg.de/DE/Ins/Pe ... tfall.html