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Mona Evans
Mona Evans • 24 weeks ago

Hoag's Object in the constellation Serpens. A ring galaxy in which there is a central core of older yellow stars with a ring of young blue stars. The formation of a galaxy like this probably involves a galactic collision, but it's still a mystery. If you look closely at the gap, you can see another ring galaxy in the distance.(Credit: R. Lucas (STScI/AURA), Hubble Heritage Team, NASA) Mona Evans, "Cosmic Collisions"

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