constellation vs Southern Triangle

constellation and Southern Triangle both are nouns.

Word	Noun	Adjective	Verb	Adverb
constellation	Yes	No	No	No
Southern Triangle	Yes	No	No	No

constellation (noun)	Southern Triangle (noun)
an arrangement of parts or elements	a small bright constellation in the polar region of the Southern Hemisphere near Circinus and Apus
a configuration of stars as seen from the earth