Here's why:
* Equator's Location: The equator is the imaginary line that circles the Earth at 0 degrees latitude, directly in the middle between the North and South poles.
* Earth's Tilt: The Earth's axis is tilted at approximately 23.5 degrees. This tilt is what causes the seasons.
* Solar Zenith: The solar zenith is the point in the sky directly overhead, at a 90-degree angle.
* Equinoxes: During the equinoxes (around March 20 and September 23), the sun's rays hit the Earth directly at the equator. This means that the sun reaches a 90-degree angle (solar zenith) at the equator on these days.
Therefore, the maximum possible elevation of the sun at the equator is 90 degrees.
