Corona Borealis, the Northern Crown, is a lovely semicircle of stars centered on Alphecca, or Gemma. The strange carbon star R Coronae Borealis, which occasionally disappears from naked eye view after covering itself in carbon soot, is labelled with an "R." The constellation Bootes is up and to the right, Hercules down and to the left, Serpens Caput down and to the right. North is toward the upper left. Corona Borealis also has a star with an orbiting planet.