Spherical sundial with more obvious proof that Sun and Earth has trigonometric mutual relation. Ball's shadow should be initially adjusted to the central groove and then the shadow is going to pass each following groove every 10 minute evenly. This didactical toy is copyrighted.
It is 3D: click it with
mice to rotate
and roll the middle
button to zoom.
This didactical toy shows constant rotation of Earth's globe. Sundial's design is created by Andrija Radović, http://www.andrijar.com All inquiries should be sent to sundialtoy2@andrijar.com