The altitude of the sun is the angle between the horizon and the sun's position in the sky. It's measured in degrees, with 0° being at the horizon and 90° being directly overhead.

Here's why it's important:

* Daylight Hours: The higher the sun's altitude, the longer the daylight hours.

* Solar Energy: The amount of solar energy reaching the earth's surface is directly related to the sun's altitude. Higher altitude means more direct sunlight.

* Temperature: The sun's altitude strongly influences temperature. Higher altitude means hotter temperatures.

* Shadows: The length of shadows depends on the sun's altitude. The higher the altitude, the shorter the shadows.

Factors Affecting Sun Altitude:

* Latitude: The sun's altitude is highest at the equator and decreases towards the poles.

* Time of Day: The sun's altitude changes throughout the day, reaching its highest point at solar noon.

* Time of Year: The sun's altitude varies throughout the year due to the Earth's tilt.

Determining Sun Altitude:

You can use specialized tools like a sextant or a solar tracker to measure the sun's altitude. There are also online calculators and smartphone apps that can determine sun altitude based on your location and time.

Let me know if you'd like to learn more about a specific aspect of the sun's altitude!