This image shows the host galaxy containing one of the newly discovered supernovae.  Comparing the images shows how the galaxy visibly brightens in 2004 and then returns to normal. This suggested that in 2003 the supernova was not detected; it appeared in 2004 and was beginning to fade in 2005.  The last frame subtracts the images from the years that the supernova was not detected as well as the galaxy's light to reveal only the supernova. Credit: Jeff Cooke/CFHT