The sun will be directly overhead at noon only if you are standing on the equator and it is the equinox.

Here's why:

* Earth's Tilt: The Earth is tilted on its axis, meaning the sun's rays hit different parts of the planet at different angles throughout the year.

* Equinox: During the equinoxes (spring and fall), the sun's rays hit the equator directly, making the sun appear overhead at noon.

* Other Locations: At any other time of year or at other latitudes, the sun will not be directly overhead at noon. Its position will depend on the time of year and how far north or south you are from the equator.

Let me know if you'd like more details about the sun's position at noon in a specific location!