The Western Hemisphere or western hemisphere is mainly used as a geographical term for the half of the Earth that lies west of the IERS Reference Meridian (which crosses Greenwich, London, United Kingdom) and east of the Antimeridian, the other half being called the Eastern Hemisphere.
In this sense, the Western Hemisphere consists of the Americas, the western portions of Africa and Europe, the extreme eastern tip of Russia, numerous territories in Oceania, and a portion of Antarctica, while excluding some of the Aleutian Islands to the southwest of the Alaskan mainland.
The term is often used in political rhetoric to refer to only North America and South America (or the New World) and adjacent islands; however, the Western Hemisphere technically includes all of the aforementioned territories.
In an effort to define the Western Hemisphere as the parts of the world which are not part of the Old World, there also exist projections which use the 20th meridian west and the diametrically opposed 160th meridian east to define the hemisphere. This projection excludes the European and African mainlands and a small portion of northeast Greenland, but includes more of eastern Russia and Oceania (e.g., New Zealand).
Nukutavake or Nukutuvake is an island in the Tuamotu group in French Polynesia. It lies 1,125 km from Tahiti. The closest land is small Pinaki Atoll, located 15 km to the southeast. Vairaatea Atoll lies 38 km to the west of Nukutavake.
Nukutavake's length is 5 km and its width between 0.45 and 1.3 km. Nukutuvake is not a typical Tuamotu atoll, but a single island. It was formed when its lagoon filled up with silt, in a similar manner as Fua Mulaku in the Maldives, which has a similar size and shape. There are shallow remains of the lagoon filled with marshy vegetation. The higher ground has many coconut palms.
Nukutavake has 139 inhabitants; Tavananui is the largest town. Many islanders have left the island in recent years, mainly to Tahiti, in search for work. There are a number of abandoned houses on the island. The people who remain live primarily on fish and copra production. There is a cyclone shelter on Nukutavake