Galáxia de ripo raro (Hoag's Object)

http://www.theregister.co.uk/2017/01/04/rare_ring_shaped_galaxy_discovered/
Citando:
"A rarer-than-rare galaxy 359 million light years away from Earth has been spotted by physicists.
Designated PGC 1000714 [paywalled], the galaxy is a ring-shape system orbiting a cooler centre without any connection between the two – a formation referred to as Hoag's Object.