File:UGC 9618, Chandra + Hubble.jpg - Wikimedia Commons
Stars/Sirius/Quiz - Wikiversity
Category:Sirius - Wikimedia Commons
Stars/Sirius - Wikiversity
Stars/Astronomy - Wikiversity
Mercury (planet) - Wikipedia
Stars/Sirius - Wikiversity
Sirius, Beyond Universe Wiki
Sirius - Wikipedia
Stars/Dwarfs/Whites - Wikiversity
Stars/X-ray classification - Wikiversity
Stars/Ultraviolets - Wikiversity
Sirius A, The Universe of The Universe Wiki
Stars/Binaries/Quiz - Wikiversity
Sirius - Wikipedia