constellation vs Ursa Minor

constellation and Ursa Minor both are nouns.

Word	Noun	Adjective	Verb	Adverb
constellation	Yes	No	No	No
Ursa Minor	Yes	No	No	No

constellation (noun)	Ursa Minor (noun)
an arrangement of parts or elements	a constellation outside the zodiac that rotates around the North Star, also known as the Little Bear or Little Dipper
a configuration of stars as seen from the earth