Black Stars are what radiologists call a type of benign radial scar, or lesion, found in breast tissue when they are checking for cancer. http://www.telegraph.co.uk/music/news/does-a-1960s-elvis-song-hold-the-key-to-bowies-blackstar-and-5-o
speckle @ 21:39 PM Mar 1616
Elvis presley - who shared a birthday with Bowie - also had a song called 'blackstar' which was about death. "Every man has a black star. A black star over his shoulder. And when a man sees his black star He knows his time, his time has come."
speckle @ 00:03 AM Feb 1616
I feel like bowie is being self-deprecating in this song - saying that when he dies - someone else will take his place. "Somebody else took his place, and bravely cried (I’m a blackstar, I’m a star's star, I’m a blackstar)"
speckle @ 18:24 PM Feb 1616