* Latitude: The shadow moves faster at the equator and slower near the poles.
* Time of year: The speed varies depending on the time of year due to the Earth's tilt and its elliptical orbit around the sun.
* Time of day: The speed is faster around midday when the sun is highest in the sky.
Here's a simplified way to think about it:
Imagine the Earth as a giant clock face. The sun's shadow moves across this face, completing a full circle in 24 hours.
* Equator: At the equator, the circle is large, so the shadow moves faster.
* Poles: At the poles, the circle is smaller, so the shadow moves slower.
To get a rough estimate:
* The shadow of the sun moves roughly 15 degrees per hour (360 degrees / 24 hours).
* This translates to approximately 1,000 miles per hour (15 degrees x 60 miles/degree) at the equator.
However, this is just a very rough estimate. To get a more precise measurement, you would need to consider the specific latitude, time of year, and time of day.
Note: The shadow's speed can also be affected by factors like clouds and other weather conditions.
