The Earth Screen Saver
(for 32-bit systems such as Windows 95/98/Me and NT/2000/XP only)
shows the Earth with the correct illumination based on the date and
time. You can view the Earth from the Sun (day side), Moon, night
side, or at a given altitude above any location specified by latitude
and longitude. New version 3.1 is compatible with dual screen
configurations on Windows XP and saves preferences in the
registry individually for each user.