Alright, so I've read many other people's riddles/WAIs...so, I figured I'd write one...this one may be very easy to some, so...we'll see how quickly it gets solved. I used to be unknown and a source of great fear Now there is plenty of warning for when I draw near. Calipso and Europa and Ganymede are three And Galileo is another Specific name for me I am noticable, though silent, and I keep to the shadows. My beauty and my splendor Two of Eight never knows.