Rev 9:1 | CPDV | STEP | And the fifth Angel sounded the trumpet. And I saw upon the earth, a star that had fallen from heaven, and the key to the well of the abyss was given to him.

Revelation of John 9:1

Locusts come forth from the bottomless pit. The vision of the army of horsemen.

1 And the fifth Angel sounded the trumpet. And I saw upon the earth, a star that had fallen from heaven, and the key to the well of the abyss was given to him. ^{▼▼9:1Notice that the pluperfect tense is used, ‘had fallen.’ The fifth Angel is a holy angel, but when he sounds the trumpet, a key is given to a fallen angel to open the gates of Hell. It is surprising that a fallen angel has this role.(Conte)
,} ^{▼▼9:1 A star full: This may mean the fall and apostasy of great and learned men from the true faith. Or a whole nation falling into error and separating from the church, not having the sign of God in their foreheads.(Challoner)
,} ^{▼▼9:1 And there was given to him the key of the bottomless pit: That is, to the angel, not to the fallen star. To this angel was given the power, which is here signified by a key, of opening hell.(Challoner)}