[Number_Cruncher]

Halley is 75 degrees south, so it is dark outside all 24 hours.

[Lonesome in Massachussets]

I was responding to a comment that they were on the Antarctic Circle. Halley Station at Latitude 75°35’ S, Longitude 26°39’ W did not see the sun yesterday. It was always at least 9° below the horizon, transiting at 13:50 GMT (11:50 local time). At best a very dim twilight.