The word "Arctic" originates from the Greek word "arktos," meaning "bear." It is derived from the constellation Ursa Major, also known as the Great Bear, which is prominent in the northern sky. The term Arctic has been used for centuries to refer to the north polar region of the Earth.
The Arctic Circle, an imaginary line located at approximately 66.5 degrees north latitude, marks the southernmost boundary of the Arctic region. Areas north of this circle experience at least one day per year where the sun does not set (midsummer) and one day where the sun does not rise (midwinter). The Arctic includes the Arctic Ocean and parts of various continents, such as North America, Europe, and Asia. The term "Arctic" is commonly used to describe the unique climate, environment, and conditions in this northernmost part of the world.