astronomer vs Giovanni Virginio Schiaparelli

astronomer and Giovanni Virginio Schiaparelli both are nouns.

Word	Noun	Adjective	Verb	Adverb
astronomer	Yes	No	No	No
Giovanni Virginio Schiaparelli	Yes	No	No	No

astronomer (noun)	Giovanni Virginio Schiaparelli (noun)
a physicist who studies astronomy	Italian astronomer who first noted lines (which he called canals) on the surface of Mars (1835-1910)