Ursa is a four-letter term for a major beast. URSA is the Latin word for bear, and is commonly used to refer to the constellation of URSA Major, which is also known as the Great Bear. URSA Major is one of the most recognizable constellations in the night sky, and is made up of seven stars that form the shape of a large bear. The constellation is associated with many myths and legends, and is often seen as a symbol of strength and power.