* Earth's Rotation: Our planet rotates on its axis, which is why we experience day and night. When your side of the Earth faces the sun, it's daytime. When your side faces away, it's nighttime.

* Earth's Orbit: Earth orbits the sun, meaning we're constantly moving around it. This orbit takes 365 days to complete, giving us the seasons.

* The Sun's Path: The sun's apparent path across the sky changes throughout the year due to the Earth's tilt and orbit.

So, while the sun is always shining somewhere on Earth, it's not visible from every location at all times.