That's not a galactic four-leaf clover - instead it's an example of how gravitational lensing split the light from a distant quasar into four distinct images.
This specific case is known as the Einstein cross: Link
That's not a galactic four-leaf clover - instead it's an example of how gravitational lensing split the light from a distant quasar into four distinct images.
This specific case is known as the Einstein cross: Link