Comment Re:Why are there four bright spots on the ring? (Score 2) 41
Pure guesswork but I presume we see a roughly circular shape because the galaxy in front looks pretty circular, from our point of view.
The four brighter spots probably reveal the shape of the galaxy behind it, to some degree. It looks like you can draw a straight line from bottom-left to top-right. Top-left and bottom-right are not prefectly aligned, but it looks like you can draw a V between them, whose angle is bisected by the straight line we drew previously. So perhaps the furthest galaxy is not perfectly aligned with the nearest one, causing the bright spots to be shifted slightly.