Verse 1
1) "And the fifth angel sounded," (kai ho pemptos angelos esalpisen) "And the fifth (of the seven) angel trumpeted," as introduced, and one by one successively announce judgments, Revelation 8:2.
2) "And I saw a star," (kai eidon astera) "And I saw or recognized a star;” Apparently Lucifer, the bright one of fallen angels, apollyon, the destroyer, Revelation 9:11; Perhaps referred to as Lucifer meaning "day-star" that fell, Isaiah 14:12; Ezekiel 28:12-14.
3) "Fall from heaven unto the earth," (ek to ouranou peptokota eis ges tes) "That had fallen out of heaven (onto) into the earth;" The fall appears to have come about the time of the final war in heaven, Revelation 12:7-12 after which he has but "a short time" on earth to do his work, for 42 months, Revelation 12:13-17.
4) "And to him was given," (kai edothe auto) "And there was given over to it (him)," (the star) perhaps to the Devil, King of demon spirits and hell, called also "prince of this world," John 12:31; John 14:30; Ephesians 2:2; Hebrews 2:14.
5) "The Key of the bottomless pit," (he kleis tou phreatos tes abussou) "The key of the shaft or (shaft-key) of the abyss (bottomless pit), of hades, present abode of souls of the unsaved and the devil and fallen angels or demon-slave-spirits to the Devil; This place is prepared for the Devil and his angels, Matthew 25:41; Hebrews 2:14; Revelation 17:8.