The sun's rays strike the equator at a nearly perpendicular angle (close to 90 degrees) throughout the year. This is because the Earth's axis is tilted at 23.5 degrees, and the equator lies on the plane that is perpendicular to this axis.

Here's a breakdown:

* Equinoxes: During the vernal (spring) and autumnal (fall) equinoxes, the sun's rays strike the equator directly at 90 degrees. This means the sun is directly overhead at noon on the equator.

* Other times of year: While the sun isn't directly overhead at the equator throughout the year, it still strikes at a high angle. This results in the equator receiving a high amount of solar radiation and experiencing relatively consistent temperatures throughout the year.

Key takeaways:

* The equator receives more direct sunlight than any other part of the Earth.

* This direct sunlight leads to warmer temperatures compared to higher latitudes.

* The equator experiences less seasonal variation in temperature compared to higher latitudes.

Let me know if you have any other questions!