The sun appears at its highest point in the sky at solar noon, which is the moment when the sun is directly overhead. This occurs when the sun's declination (its position north or south of the equator) is equal to the latitude of the observer's location. Solar noon varies depending on the time of year and the observer's location on Earth.

- In the Northern Hemisphere, solar noon occurs when the sun is at its southernmost point in the sky during the summer solstice. This typically happens around June 21st each year.

- In the Southern Hemisphere, solar noon occurs when the sun is at its northernmost point in the sky during the summer solstice. This typically happens around December 21st each year.

Sun at its Lowest Point

The sun appears at its lowest point in the sky at astronomical twilight, which is the moment when the sun is 18 degrees below the horizon. Astronomical twilight occurs just before sunrise and just after sunset, and it marks the transition between night and day.

The time of astronomical twilight varies depending on the latitude of the observer's location. In general, astronomical twilight occurs earlier in the morning and later in the evening at higher latitudes.