The STS-43 crew portrait includes 5 astronauts. Pictured from left to right are Shannon W. Lucid, mission Specialist 1; James C. Adamson, mission Specialist 2; John E. Blaha, commander; G. David Low, mission Specialist 3; and Michael A. Baker, pilot.
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]