In keeping with the spirit of the Internet, the information and images on this website may be used for noncommercial and educational purposes. In other words, an Internet user may download a file and share it with others where no personal or commercial gain is involved.

COMMERCIAL PUBLICATION OR EXPLOITATION OF THESE MATERIALS IS SPECIFICALLY PROHIBITED.

The CfA's goal is to provide our electronic audience with information and images about the ongoing research in astronomy and astrophysics carried out in our observing and laboratory programs.

We encourage the use of these materials for noncommercial educational or informational purposes. However, for example, their inclusion on a CD-ROM, public domain or otherwise, is prohibited. Similarly, permission for use of these files in other media--print or electronic--must be requested in advance and is granted on a case-by-case basis.

To request permission for use of these files or images, or if you have questions regarding this policy, please contact www-admin@cfa.harvard.edu. When requesting permission to use an image, please include the url of the image.