Roya Astro
Roya Astro
Saturday, February 10, 2018

Hourglass Diagram

view full screen

All astronomy yearbooks display some form of "hourglass" diagram, that shows the times when Sun, Moon and planets rise and set.
Finding the times for sunrise and sunset is easy enough, drawing the lines too. Coloring is more involved, but paper.js greatly helps. Next steps: add planets..