Astronomer is a noun.
Astronomers is a plural noun.
It is a common noun. It can be a proper noun as part of a title like "The Astronomer Royal."
what part of speech is work
adverb
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Astronomical is an adjective, a word that describes a noun. Example: It takes an astronomical amount of money to build a house on the moon.
An astronomer need not have any particular need to observe any part of the sun's atmosphere.
It is the gap in the ring system called the Cassini Division, named after the astronomer Cassini.
part of speech
The part of speech for this particular word is a noun.
It is a common noun. It can be a proper noun as part of a title like "The Astronomer Royal."
adverb
what part of speech is work
what part of speech is beneath
Sashay is a verb. It means to walk in an exaggerated, showy manner, often with hip swaying.
"Did not" or "didn't" is a contraction of the auxiliary verb "did" and the adverb "not," forming a negative past tense construction in English.
He was Prussian, and at that time Prussia was a part of Poland.