English: Nunataks in the western portion of the Greenland ice sheet seen from the NASA P-3B during an IceBridge survey of southwestern Greenland on Apr. 8, 2013. Nunataks are areas of exposed rock in an ice sheet such as ridges or mountain peaks. These jagged rock formations are sometimes used as landmarks on an ice sheet.
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]