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]
Uploaded a work by AVCS imagery from NASA's Nimbus 2 Satellite from https://n5eil01u.ecs.nsidc.org/DP0/BRWS/Browse.001/2019.06.12/NmAVCS1H.617.01.1966.01.181.15.40.51.01.02.917.997.943.1077.13.png?_ga=2.121585736.1328016302.1723498789-1940691830.1723498789 with UploadWizard