This week, skywatchers will have the chance to catch a winking "demon star" in the night sky.
The star, known as Algol, is located in the constellation of Perseus, the Hero, and has been known since ancient times as "The Demon Star."
Algol has a long and venerable history. Its name comes from the Arabic word al-ghul, which means "female demon." But, contrary to popular belief, the name seems to have nothing to do with the star's behavior, but rather, is due merely to Algol's position marking the head of the Gorgon Medusa in ancient Greek mythology. According to the myth, gazing at Medusa could turn a person to stone.