OrbClock

What is time? Earth spins inside an imaginary fixed 24h clock dial floating over the equator, 12 always facing the Sun. Your meridian is simply a clock hand uniquely defining your true time. Earth is just a giant watch.

Intuitive educational app with beautiful 3D graphics that helps understanding planetary motion in relation to location and time. Self explains formation of seasons due to Earth's tilt. With real math and real planetary motion.

You can twist it, turn it, zoom it anyway you want it to create your own clock scene.