For the people who don't know: Those are foreground stars, the black center is due to the camera pixels becoming overloaded and leaking into adjacent pixels. So no UFOs and not galaxies.
And it seems someone wanted the image to be wider so there is a bit copy pasted on the right it seems. Very weird edit really.
Shit, look at all those black flying saucers coming straight at the telescope! Quick, hide the women, arm the kids and call {current best alien killing hollywood star}!