Tropical Events:
the solstices and equinoxes
This presentation is a simple layman’s study of some interesting aspects of Earth’s orbital history, especially concerning solstices and equinoxes, and the changing lengths of the days, seasons, and years. The charts below are from an Excel spreadsheet, created with an open source Excel Add-In, both of which I am making available at the end of this webpage: as I would have loved to have started out with something similar 10 years ago, when I first became interested in “the motions of the heavens” and the w