Sky is a noun. It can be use as a subject.
Aurora is a noun.
Eyepiece is a noun.
The word orbiting is a verb. It is the present participle of orbit.
The darkest part of the night is called midnight, which is the point halfway between sunset and sunrise when the sun is at its lowest point below the horizon.
"night" is a noun
determiner
"night" is a noun
Nocturnal is an adjective - pertaining to the night
"Night" is a noun. It refers to the period of darkness between sunset and sunrise.
"Tuesday night" is a two word adverb of time. For those who insist that a part of speech must be a single word, "night" is an adverb modifying "gathered" and "Tuesday" is an adverb modifying "night".
It is an adverb. Obviously.
Chicken curry :P
Sleepy is an adjective; it modifies nouns.
"Craig's" is a possessive noun.
part of speech
The part of speech for this particular word is a noun.