William Barclay's Daily Study Bible - Revelation 9:1-2
9:1,2 The fifth angel sounded a blast on his trumpet, and I saw a star failing from heaven on the earth, and to him there was given the key of the shaft of the bottomless abyss; and he opened the shaft of the abyss; and smoke went up from the shaft like the smoke of a great furnace, and the sun and the air were darkened by the smoke from the abyss. The picture of terror mounts in its awful intensity. Now the terrors coming upon the earth are beyond nature; they are demonic; the abyss is... read more
Matthew Henry's Complete Commentary - Revelation 9:1-12
Upon the sounding of this trumpet, the things to be observed are, 1. A star falling from heaven to the earth. Some think this star represents some eminent bishop in the Christian church, some angel of the church; for, in the same way of speaking by which pastors are called stars, the church is called heaven; but who this is expositors do not agree. Some understand it of Boniface the third bishop of Rome, who assumed the title of universal bishop, by the favour of the emperor Phocas, who, being... read more