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The Cartwheel Galaxy: A strikingly beautiful and rare “ring” galaxy about 500 million light-years away.

The Cartwheel, located about 500 million light-years away from Earth in the constellation Sculptor in the southern sky, is a rather rare type of galaxy that astronomers call a ring galaxy.

They theorized that it could be a supernova remnant, galactic planetary nebula or a face-on star-forming galaxy or ring galaxy.

The astronomers noted R5519 is comprised of a ring of stars, known as a “collisional ring galaxy.”

When a small galaxy runs into a larger one face-on it can produce one of the loveliest of the rare irregulars, a ring galaxy thousands of light-years across, set against the velvet of intergalactic space.