Hoag’s Object Is a Galaxy Within a Galaxy Within a Galaxy (and Nobody Knows Why) – Livescience.com

Look closely at the serpent constellation
slithering through the northern sky, and you might see a galaxy within a galaxy within a galaxy.
This cosmic turducken is known as Hoag’s object, and it has befuddled stargazers since astronomer Arthur Hoag discoveā€¦ [+2073 Stop Your Dog\’s Barking]

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