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In English, it was known as pole star or north star; in Spenser, also steadfast star. An older English name, attested since the 14th century, is lodestar guiding star, cognate with the Old Norse leiÃ°arstjarna, Middle High German leitsterne. Use of the name Polaris in English dates to the 17th century. It is an ellipsis for the Latin stella polaris pole star. Another Latin name is stella maris sea-star, which, from an early time, was also used as a title of the Blessed Virgin Mary, popularized in the hymn Ave Maris Stella (8th century).
A pole star is a visible star, preferably a prominent one, that is approximately aligned with the Earth's axis of rotation; that is, a star whose apparent position is close to one of the celestial poles, and which lies approximately directly overhead when viewed from the Earth's North Pole or South Pole.