Size of the Sun

Project for Elementary Astronomy

In this project you will make a simple measurement of the Sun using a homemade pinhole projection device, then use this measurement and the known distance to the Sun to calculate the Sun's diameter. The key to getting good results is making careful observations.

WARNING: At no point in this project do you need to look directly at the Sun. Directly looking at the Sun can cause serious and permanent damage to your eyes.

To conduct this observing project, follow this procedure: To complete the project, include the following in your analysis: