constellation vs Ursa Major

constellation and Ursa Major both are nouns.

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

constellation (noun)	Ursa Major (noun)
an arrangement of parts or elements	a constellation outside the zodiac that rotates around the North Star, also known as the Great Bear or Charles' Wain
a configuration of stars as seen from the earth