I've been using my iPhone in standby mode at night and I have the world map with the daylight "sine wave" on. Its been fun watching the shape of the daylight region change as it get closer and closer to the top of the map. After the equinox it pops through the top of the map and then it's upside-down for the next 6 months.
Watching the changing shape of the daylight illuminated portion of the map over the year has given me a much better understanding of what the equinox means, why daylight hours shift, and just in general a better appreciation of our place in the solar system.
Watching the changing shape of the daylight illuminated portion of the map over the year has given me a much better understanding of what the equinox means, why daylight hours shift, and just in general a better appreciation of our place in the solar system.