The term "stars" here refers to angels.
13 Raging waves of the sea, foaming out their own shame; wandering stars, to whom is reserved the blackness of darkness for ever.
11 And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter.
If you consider the use of stars in Jude 13, and the star that fell from heaven in Revelation 9:1, it becomes obvious that the great star that fell from heaven is not a meteor but a great "fallen" angel. This would be Satan in his guise of antichrist.
Let's go on here, in Jude 13 there is talk of raging waters. This is clearly explained to us in Revelation 17:15 below.
Consider this, if the great star that falls from heaven is an angel whose name is wormwood which is Greek for bitterness and in Hebrew it is curse as in poisonous.
The definition of wormwood is perfect for the antichrist since he will turn people away from the true Christ and will cause a spiritual death for all that belive that antichrist is the true Christ.
8 Seek him that maketh the seven stars and Orion, and turneth the shadow of death into the morning, and maketh the day dark with night: that calleth for the waters of the sea, and poureth them out upon the face of the earth: The Lord is his name:
9 That strengtheneth the spoiled against the strong, so that the spoiled shall come against the fortress.
When people worship a false god, be it a man made idol or an angel disguised as the true Christ this will bring about wormwood which is bitterness and a spiritual death because all living are in Christ, not some idol.
18 Lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from the Lord our God, to go and serve the gods of these nations; lest there should be among you a root that beareth gall and wormwood;
19 And it come to pass, when he heareth the words of this curse, that he bless himself in his heart, saying, I shall have peace, though I walk in the imagination of mine heart, to add drunkenness to thirst:
20 The Lord will not spare him, but then the anger of the Lord and his jealousy shall smoke against that man, and all the curses that are written in this book shall lie upon him, and the Lord shall blot out his name from under heaven.