January 2004 - The Helix Nebula
February 2004 - The Boomerang Nebula
March 2004 - HD 209458b (artist's impression)
April 2004 - The Ghost Head Nebula
May 2004 - The Omega Nebula
June 2004 - The Tadpole galaxy
July 2004 - The Cone Nebula
August 2004 - The Mice
September 2004 - Erupting star V838 Monocerotis
October 2004 - Primeval quasar (artist's impression)
November 2004 - The Horsehead nebula
December 2004 - The Lynx Arc (artist's impression)
