10 The third angel sounded, and a great star fell from the sky, burning like a torch, and it fell on one third of the rivers, and on the springs of the waters.
the third trumpet, a great star – stars are spirits, manifest as angels. Angels are called stars throughout the Bible, eg. Rev 9:1, Rev 1:16, Rev 1:20, Isa 14:12, Dan 8:10 etc. We can see this in the fifth trumpet, in Rev 9:1, which cites another star (Angel) that fell from heaven.
fell from heaven – from Rev 9:1, Isa 14:12, and Rev 12:4, we know that stars that fall to the ground are the workers of Satan.