×this interactive virtual model of the solar system calculates the heliocentric longitudes of the planets for any given date. orbital paths and planetary sizes are not to scale. time advances at a rate of 1 day per second (or 5 days per second in fast-forward mode). clicking the stop button resets the model to the current date. the model was calibrated as of january 1, 2025, courtesy of the national astronomical observatory of japan.

this project has been coded in html 5 and was developed by prof. em. thomas weibel.

(ȼ) thomas weibel, basel