Orb Makes Itself Into a "Cyclops"

At the two ends of Grand Central Terminal are huge arches, one of which is shown below in a photo from March 9, 2016. The blue orb at the top is not a regular feature of the architecture -- it is a mysterious orb playing a little "riding exactly on the top of the arch" stunt.

Speaking of "orb stunts," I saw another one last night (March 21, 2016), where I photographed the orb below.  The orb seems to have positioned itself rather precisely so that it has got a "big eye" at its top, one that is very evenly positioned in the middle of the orb.  Call it "the Cyclops trick."

At another time on the same day, I photographed another orb that seem to have pulled the same stunt. Again the orb has positioned itself precisely between the "eyes" to its left and right.