Polaris; the North Star; Alpha Ursae Minoris
Astronomical proper noun for the star Polaris, commonly known as the North Star.
Polaris is known as the North Star.
UGM-27 Polaris (missile)
Refers specifically to the UGM-27 Polaris submarine-launched ballistic missile; a historical military term.
See also: 潜水艦発射弾道ミサイル (せんすいかんはっしゃだんどうミサイル)
The Polaris missile was deployed during the Cold War.