Hoag's Object
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Hoag's Object is an unusual ring galaxy in the constellation of Serpens Caput. It is named after Arthur Hoag, who discovered it in 1950 and identified it as either a planetary nebula or a peculiar gal
Hoag's Object, taken by the Hubble Space Telescope in July 2001
Ring galaxy
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A ring galaxy is a type of galaxy that includes a large annular structure. The galactic center may be relatively separate from the ring structure, or present a continuous disc shape. Hoag's Object, di
Vela ring galaxy, and a bright star known as HD 88170.
Ring Galaxy - II Zwicky 28
Image of AM 0644-741 by the Hubble Space Telescope (HST)