The Tropic of Cancer, also known as the Northern Tropic, is the Earth's northernmost circle of latitude where the Sun can be seen directly overhead. This occurs on the June solstice, when the Northern Hemisphere is tilted toward the Sun to its maximum extent. It also reaches 90 degrees below the horizon at solar midnight on the December Solstice. Using a continuously updated formula, the circle is currently 23°26′09.9″ (or 23.43607°) north of the Equator.
The 45th parallel south is a circle of latitude that is 45° south of the Earth's equator.
The 10th parallel north is a circle of latitude that is 10 degrees north of the Earth's equatorial plane. It crosses Africa, the Indian Ocean, the Indian Subcontinent, Southeast Asia, the Pacific Ocean, Central America, South America, and the Atlantic Ocean.
The 20th parallel north is a circle of latitude that is 20 degrees north of the Earth's equatorial plane. It crosses Africa, Asia, the Indian Ocean, the Pacific Ocean, North America, the Caribbean, and the Atlantic Ocean.
The 30th parallel south is a circle of latitude that is 30 degrees south of the Earth's equator. It stands one-third of the way between the equator and the South Pole and crosses Africa, the Indian Ocean, Australia, the Pacific Ocean, South America and the Atlantic Ocean.
The 50th parallel south is a circle of latitude that is 50 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, the Indian Ocean, the Pacific Ocean and South America.
The 60th parallel south is a circle of latitude that is 60 degrees south of Earth's equatorial plane. No land lies on the parallel—it crosses nothing but ocean. The closest land is a group of rocks north of Coronation Island of the South Orkney Islands, which are about 54 km south of the parallel, and Thule Island and Cook Island of the South Sandwich Islands, which both are about 57 km north of the parallel.
The 35th parallel south is a circle of latitude that is 35 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, the Indian Ocean, Australasia, the Pacific Ocean and South America.
The 55th parallel south is a circle of latitude that is 55 degrees south of the Earth's equatorial plane. It crosses the Atlantic Ocean, the Indian Ocean, the Pacific Ocean and South America.
The 66th parallel north is a circle of latitude that is 66 degrees north of the Earth's equatorial plane, about 61 km south of the Arctic Circle. It crosses the Atlantic Ocean, Europe, Asia and North America.
The 72nd parallel north is a circle of latitude that is 72 degrees north of the Earth's equatorial plane, in the Arctic. It crosses the Atlantic Ocean, Europe, Asia, the Arctic Ocean and North America.
The 70th parallel south is a circle of latitude that is 70 degrees south of the Earth's equatorial plane in the Antarctic. The parallel passes through the Southern Ocean and Antarctica.
The 66th parallel south is a circle of latitude that is 66 degrees south of the Earth's equatorial plane, about 61 km north of the Antarctic Circle. It crosses the Southern Ocean and Antarctica.
The 64th parallel south is a circle of latitude that is 64 degrees south of the Earth's equatorial plane. It crosses the Southern Ocean and the Antarctic mainland, the latter as the most northern latitude.
The 65th parallel south is a circle of latitude that is 65 degrees south of the Earth's equatorial plane. It crosses the Southern Ocean and Antarctica.
The 67th parallel south is a circle of latitude that is 67 degrees south of the Earth's equatorial plane, about 50 km south of the Antarctic Circle. It crosses the Southern Ocean and Antarctica.
The 68th parallel south is a circle of latitude that is 68 degrees south of the Earth's equatorial plane, in the Antarctic. It crosses the Southern Ocean and Antarctica. At this latitude, the sun is visible for 24 hours, 0 minutes during the December Solstice, and civil twilight during the June Solstice.
The 75th parallel south is a circle of latitude that is 75 degrees south of the Earth's equatorial plane in the Antarctic. It passes through the Southern Ocean and Antarctica.
The Antarctic Circle is the most southerly of the five major circles of latitude that mark maps of 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 the centre of the Sun is below the horizon for 24 continuous hours at least once per year ; this is also true within the equivalent polar circle in the Northern Hemisphere, the Arctic Circle.
The Arctic Circle is one of the two polar circles, and the most northerly of the five major circles of latitude as shown on maps of Earth at about 66° 34' N. Its southern equivalent is the Antarctic Circle.
