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 | This projector can also be used to observe Sun spots. |
| Further, the elliptical orbit of the Earth can be demonstrated. This is done by measuring the apparent size of the Sun at six monthly intervals. |
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| DO NOT sight through the projector at the Sun! |
To sight on the Sun, adjust the tube until you cannot see its shadow on the shield. It is now correctly sighted and an image of the Sun appears on the ground. Move the box until you catch the image of the Sun in it. You may need to adjust the fine focus tube to sharpen the picture. |
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