This web article from NASA's Visible Earth presents a classic photograph of Earth taken from the Apolo 17 mission in 1972, which includes the south polar ice cap. The article contains several downloadable images, and links are provided for more information.
Goddard Space Flight Center. The Blue Marble from Apollo 17. Greenbelt: Goddard Space Flight Center, June 8, 2006. https://visibleearth.nasa.gov/images/55418/the-blue-marble-from-apollo-17 (accessed 18 June 2021).
%0 Electronic Source %D June 8, 2006 %T The Blue Marble from Apollo 17 %I Goddard Space Flight Center %V 2021 %N 18 June 2021 %8 June 8, 2006 %9 image/jpeg %U https://visibleearth.nasa.gov/images/55418/the-blue-marble-from-apollo-17
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