It's a prepositional phrase.
"from the heavens" is a Prepositional Phrase.A prepositional phrase is a phrase that starts with a preposition and contains an object (either noun or pronoun).
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
simile
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.