# Measuring the Sun's Diameter

Hard
Have you ever wondered how big the sun is? Well, with a simple instrument, you can measure the sun's diameter from Earth! All you need is two boxes, two pieces of cardboard, a meter stick, a razor blade, masking tape, and a piece of aluminum foil.

## Hypothesis

The hypothesis is that the diameter of the sun can be accurately measured from Earth.

## Method & Materials

You will construct an instrument with two boxes, two pieces of cardboard, a meter stick, a razor blade, masking tape, and a piece of aluminum foil. You will then point the instrument towards the sun and measure the distance between the two cards.
You will need two small cardboard boxes, two pieces of stiff cardboard, a meter stick, a single edged razor blade or sharp knife, masking tape, and a small piece of aluminum foil.

## Results

After measuring the distance between the two cards, you can use the formula to calculate the diameter of the sun. The results of this experiment show that the diameter of the sun can be accurately measured from Earth.

## Why do this project?

This science project is unique because it allows students to measure the diameter of the sun from Earth, using a simple instrument.

## Also Consider

Experiment variations to consider include measuring the diameter of the sun at different distances from Earth, or measuring the diameter of the sun at different times of the year.

## Full project details

You can find additional information and details for this science fair project here. Have fun exploring!