No star dips below the horizon and the Sun never climbs above it
in this remarkable
Lewin's Challenge image of 24 hour long
Showing all the trails as complete circles, such
an image could be achieved only from two places on
This example was recorded during the course of May 1, 2012,
the camera in a heated box on the roof of MAPO, the
A. Pomerantz Observatory at the South Pole.
Directly overhead in the faint
is the projection of
Earth's rotational axis, the South
at the center of all the star trail circles.
Not so well placed
as Polaris and the North Celestial Pole,
the star leaving the small but still relatively bright circle
around the South Celestial Pole is
A shimmering apparition of the
aurora australis also visited on this
24 hour night.
(South Pole Station)