It is an adverb phrase, although in forms such as "The period after a supernova is marked by stellar collapse" it seems to be an adjective phrase.
No, "after a supernova" is a prepositional phrase because it begins with the preposition "after" and provides information about the timing or sequence of the event (supernova). It is used to describe when something happened in relation to the supernova.
No, "at the moon" is a prepositional phrase. It begins with the preposition "at" and includes the noun "moon." An adverb phrase typically modifies a verb, adjective, or adverb.
The phrase is usually an adverb phrase since it answers the question "where." Example" He looked at the Moon. (adverb phrase)
No, "last night" is not an adverb. It is a noun phrase that refers to the time period of the night before the current day. An adverb modifies a verb, adjective, or another adverb to provide more information about time, manner, place, degree, etc.
Dark can be an adjective or a noun. Darkly is an adverb.
Adverb: "A black hole forms when a supermassive star collapses after a supernova explosion."
Prepositional phrases that begin with after are adverb phrases: e.g. "The nebula formed after a supernova" meaning the nebula formed afterward.
"after a supernova" is the adverb phrase in the sentence.
If the phrase describes (modifies) a noun or pronoun, it's an adjective phrase. If the phrase describes a verb, adjective, or adverb, it's an adverb phrase.
Adverb Phrase
adverb phrase
an adjective phrase acts like an adjective and modifies the noun or pronoun in the sentence. an adverb phrase acts like an adverb and modifies the verb, adjective, or adverb in the sentence.
It is an adverb phrase (tells where).
adjective phrase
adverb
adverb phrase
Prepositional phrases that begin with after are adverb phrases: e.g. "The nebula formed after a supernova" meaning the nebula formed afterward.