giovedì 21 ottobre 2010

If the sun rises at midnight

Norway, midnight sun (montage)

The North Pole and the South Pole are two geographic places described by the opposite alternance of light and dark.
At the North Pole, the sun is permanently above the horizon during the summer months (March-September) and permanently below the horizon during the winter months (September-March).
At the South Pole it's just the contrary: during the southern winter (March–September), the South Pole receives no sunlight at all, but in the summer (September–March), the sun is continuously above the horizon.

The midnight sun is a natural phenomenon occurring in summer months at latitudes north and nearby to the south of the Arctic Circle, and south and nearby to the north of the Antarctic Circle where the sun remains visible at the local midnight. The opposite phenomenon, polar night, occurs in winter when the sun stays below the horizon throughout the day.

Nessun commento:

Posta un commento