Astronomy Picture of the DayDiscover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 March 28 1006 AD: Supernova in the Sky Credit & Copyright: Tunç Tezel Explanation: A new star, likely the brightest supernova in recorded human history, appeared in planet Earth's sky in the year 1006 AD. The expanding debris cloud from the stellar explosion is still visible to modern astronomers, but what did the supernova look like in 1006? Astronomer Tunç Tezel offers this suggestion, based on a photograph...