Ursa Minor is a constellation not a star
Yes, it's the alpha-star in Ursa Minor.
Polaris is the brightest star in Ursa minor but that does not necessarily mean that it is the biggest.
Ursa Minor. Currently. (Which star is "the north star" changes very slowly because the Earth "wobbles".) In about 10,000 years the north star will be Vega, which is in the constellation Lyra. The north celestial pole can also point to the locations within the constellations Draco, Cygnus, and Hercules over its 26,000 year long cycle.
ursa minor ursa major
Polaris (North Star)
Ursa Minor
Ursa Major, the Great Bear and Ursa Minor, the Little Bear ursa the star consellation
Ursa Minor, the small bear.
Ursa Minor, the little bear
Ursa Minor/Ursa Major, the star which you might be referring to is Polaris.
Ursa Minor, also known as the "smaller bear," originated in ancient Greek mythology. The brightest star in the constellation is Polaris, also known as the North Star.
The north star is part of the constellation Ursa Minor, and is near such constellations as Ursa Major, Cassiopeia, and Draco.