"And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon a third of the rivers, and upon the springs of water; And the name of the star is called
Wormwood: and a third of the waters became Bitter; and many people had died of the waters, because they were made bitter." (Revelation 8:10, 11 - KJV).
Don't mean to creep anybody out, but I thought of this passage when I saw the Google Sky screen capture and checked the coordinates myself. Whatever that glob is it does not look like your typical Google glitch.
Absinth???