The Novaya Zemlya archipelago is composed of how many islands?

Novaya Zemlya ( lit. "New Land"), also known as Nova Zembla (especially in Dutch), is an archipelago in the Arctic Ocean in northern Russia and the extreme northeast of Europe, the easternmost point of Europe lying at Cape Flissingsky on the Northern island. West of Novaya Zemlya is the Barents Sea, and to the east is the Kara Sea.

Novaya Zemlya is composed of two main islands, the northern Severny Island and the southern Yuzhny Island, which are separated by the Matochkin Strait. Administratively, it is incorporated as Novaya Zemlya District, one of the twenty-one in Arkhangelsk Oblast, Russia.

Novaya Zemlya was a sensitive military area during the Cold War years, and parts of it are still used for airfields today. The Soviet Air Force maintained a presence at Rogachevo on the southern part of the southern island, on the westernmost peninsula. It was used primarily for interceptor aircraft operations, but also provided logistical support for the nearby nuclear test area. Novaya Zemlya was the site of one of the two major nuclear test sites managed by the USSR, used for air drops and underground testing of the largest of Soviet nuclear bombs, in particular the October 30, 1961 air burst explosion of Tsar Bomba, the largest, most powerful nuclear weapon ever detonated.