Hi all, I was under the impression that during the winter the sky is always dark in Antarctica. I am specifically interested in the mountain Vinson Massif. I am trying to find out at what time of the year one could observe either a sunset or sunrise under the coldest conditions possible and at the highest altitude possible. Vinson Massif seems to me to be the best pick of both of these conditions. So can anyone tell me the date of the last sunset in the summer and the first sunrise in the winter? Also, do you know kind of temperature to expect at the summit of Vinson Massif at these moments? Finally, is there often cloud cover below the summit which would block viewing of the ground below? Thanks.