Because there are no permanent human settlements south of the Antarctic Circle, apart from research stations, the countries and territories whose … See more

Since the axial tilt of Earth is considerable (23 degrees, 26 minutes, 21.41196 seconds), at high latitudes the Sun does not set in summer; rather, it remains continuously visible for one day during the summer solstice at the polar circle, for several weeks only … See more

The number of days per year with potential midnight sun increases the closer one goes toward either pole. Although approximately defined by the polar circles, in practice, midnight sun can be seen as much as 90 km (56 mi) outside the polar circle, as described … See more

The term "midnight sun" refers to the consecutive 24-hour periods of sunlight experienced north of the Arctic Circle and south of the Antarctic Circle. Other phenomena are sometimes referred to as "midnight sun", but they are caused by time zones See more

• Lutgens F.K., Tarbuck E.J. (2007) The Atmosphere, Tenth Edition, page 39, PEARSON, Prentice Hall, NJ. See more

• What is the secret behind midnight sun in Norway See more