Scott Base personnel in Antarctica marked the end of summer by watching the sunset on a prominent landmark on Wednesday.
Temperatures were minus 50 degrees Celsius in the wind at the time.
The sunset marked the beginning of winter. The next time the sun will rise above the horizon will be 19 August.
Scott Base field support member Mike Rowe said the sky lit up the side of Mount Erebus and the hike to the bottom of Castle Rock was definitely worth it.
Five Antarctic Heritage Trust conservators will work all winter to restore artefacts from a hut on Cape Evans.
Items such as science equipment, horse harnesses and food have been recovered from the hut. They will be logged, repaired and returned when the sun rises again.