GALEX: Stephan's Quintet and NGC 7331 Star Clusters Born in the Wreckage of Cosmic Collisions News Release at ESA/Hubble Stephan's Quintet NightSkyInfo.com : Stephan's Quintet What's Behind Stephan's Quintet?
Ανακτήθηκε στις 2006-10-20.  GALEX: Stephan's Quintet and NGC 7331 (Αγγλικά) Star Clusters Born in the Wreckage of Cosmic Collisions (Αγγλικά) News Release at ESA/Hubble (Αγγλικά) Stephan's Quintet (Αγγλικά) NightSkyInfo.com : Stephan's Quintet (Αγγλικά) What's Behind Stephan's Quintet?