Photo taken August 24, 1956 (18 days before the opposition on September 11, 1956) using the Mt. Wilson 60-inch reflector its aperture cut to 21 inches by an off-axis diaphragm. The positive, used in making the print, was composed by George Emmerson at the Jet Propulsion Laboratory.
This image is in the public domain because it is a mere mechanical scan or photocopy of a public domain original, or – from the available evidence – is so similar to such a scan or photocopy that no copyright protection can be expected to arise. The original itself is in the public domain for the following reason:
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
This tag is designed for use where there may be a need to assert that any enhancements (eg brightness, contrast, colour-matching, sharpening) are in themselves insufficiently creative to generate a new copyright. It can be used where it is unknown whether any enhancements have been made, as well as when the enhancements are clear but insufficient. For known raw unenhanced scans you can use an appropriate {{PD-old}} tag instead. For usage, see Commons:When to use the PD-scan tag.
Note: This tag applies to scans and photocopies only. For photographs of public domain originals taken from afar, {{PD-Art}} may be applicable. See Commons:When to use the PD-Art tag.
File history
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== {{int:filedesc}} == {{Photograph |photographer = R. B. Leighton |title = |description = {{en|1=Photo of Mars from page ii of ''Concepts for detection of extraterrestrial life'', NASA (1964)}} |depicted people = |depicted place = Mars |date = August 24, 1956 |medium = |dimensions = |institution = |department = |references = |object history = |exhibition history = |credit line =...