the antarctic circle has 24 hours of daylight on summer solstice.
the antarctic circle has 24 hours of daylight on summer solstice.
when does the antarctic circle have 24 hours of daylight?
summer solstice
directly on the antarctic circle these events occur, in principle, exactly once per year: at the december and june solstices, respectively. however, because of atmospheric refraction and mirages, and because the sun appears as a disk and not a point, part of the midnight sun may be seen on the night of the southern summer solstice up to about 50 minutes (′) () north of the antarctic circle; similarly, on the day of the southern winter solstice, part of the sun may be seen up to about 50′ south of the antarctic circle. that is true at sea level; those limits increase with elevation above sea level, although in mountainous regions there is often no direct view of the true horizon. mirages on the antarctic continent tend to be even more spectacular than in arctic regions, creating, for example, a series of apparent sunsets and sunrises while in reality the sun remains under the horizon.
antarctic circle
the antarctic circle is the most southerly of the five major circles of latitude that mark maps of the earth. the region south of this circle is known as the antarctic, and the zone immediately to the north is called the southern temperate zone. south of the antarctic circle, the sun is above the horizon for 24 continuous hours at least once per year (and therefore visible at midnight) and the centre of the sun is below the horizon for 24 continuous hours at least once per year (and therefore not visible at noon); this is also true within the equivalent polar circle in the northern hemisphere, the arctic circle.
antarctic circle