Shadows change in direction and shape based on the direction and distance of the light source and the object.

The shortest shadows made by the sun occur at noon (12pm).

Warmer, longer days when tilted towards the sun.

Colder, shorter days when tilted away from the sun.

The movement through our orbit allows us to view different parts of the galaxy, which causes some constellations (groups of stars) to only be seen at certain times of the year.