The Four Seasons

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DayLength.gif	EarthYear.gif	Insolation.gif	Rays_Dec.gif
Rays_Equinox.gif	Rays_June.gif	Rays_Seasons.gif	SunPaths.gif

Copyright Notice:

All of these images are Copyright © Richard W. Pogge, All Rights Reserved.

Use Notes:

These images were created using a variety of drawing tools in PowerPoint for use in my introductory astronomy lectures. While I reserve Copyright on these images, you are free to use them for any educational or non-commercial purpose. All I ask is that you contact me if you use them so I have a record. If you use them on a webpage, please provide me with a link. For commercial or print applications, please contact me for written permission to use the graphics.

A few graphics contain elements (usually images) derived from copyrighted sources.