Celestial hemisphere:  Northern  ·  Constellation: Serpens (Ser)
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Hoag's Object, Frank Zoltowski
Hoag's Object
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Hoag's Object

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Hoag's Object, Frank Zoltowski
Hoag's Object
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Hoag's Object

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Description

Hoag's Object, also known as PGC 54999 is a rare ring galaxy approximately 600 million light years away. The galaxy is named after Arthur Hoag who initially thought is was a planetary nebula or an “Einstein Ring” from a quasar. But later spectroscopic studies show that both the core and ring have the same redshift, hence the same distance. The core consists of older stars, while the 45 arc second diameter ring contains younger hot blue stars. The diameter is slightly larger than the Milky Way.

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Hoag's Object, Frank Zoltowski