[George Marston, illustration of the Antarctic midnight sun from the Nimrod Expedition, 1907-09]

“Brilliantly fine clear weather with bright moonlight throughout. The moon’s rays are wonderfully strong, making midnight seem as light as an ordinary overcast midday in temperate climes. The great clearness of the atmosphere probably accounts for our having eight hours of twilight with a beautiful soft golden glow to the northward. A little rime and glazed frost are found aloft. The temperature is —20° Fahr. A few wisps of cirrus-cloud are seen and a little frost-smoke shows in one or two directions, but the cracks and leads near the ship appear to have frozen over again.”

— Ernest Shackleton, South