English: STS 61-A crew portrait onboard Challenger on the middeck. Bottom row (l.-r.) Ernst Messerschmid, Wubbo J. Ockels, Steven R. Nagel, and Guion S. Bluford, Jr. Back row (l.-r.) Henry W. Hartsfield, Jr., Bonnie J. Dunbar, James F. Buchli and Reinhard Furrer. The collar colors indicate blue or red shifts.
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]