NASA materials may not be used to state or imply the endorsement by NASA or by any NASA employee of a commercial product, service or activity, or used in any other manner that might mislead. NASA should be acknowledged as the source of its material. It is unlawful to falsely claim copyright or other rights in NASA material. NASA shall in no way be liable for any costs, expenses, claims or demands arising out of use of NASA's cassettes and photographs by a recipient's distributees.
NASA personnel are not authorized to sign indemnity or hold harmless statements, release from copyright infringement, or documents granting exclusive use rights.
Photography
Photographs are not protected by copyright unless noted. If copyrighted, permission should be obtained from the copyright owner prior to use. If not copyrighted, photographs may be reproduced and distributed without further permission from NASA. If a recognizable person appears in a photograph, use for commercial purposes may infringe a right of privacy or publicity and permission should be obtained from the recognizable person.
Contact
If further information or assistance is needed, you may contact:
NASA Headquarters
Office of Public Affairs
Media Services Division
News and Imaging Branch
Code PM
300 E St., SW
Washington, DC 29546
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]