Orb "Glinda Ball" Hovers Among Commuters

Photo date:  June 10, 2015. Photographer: Mark Mahin.

The photo below was taken in Grand Central Station in New York.

This is a closeup from the photo below (I used the IrfanView "Auto-adjust colors" menu option on the closeup). The photo below is the full photo.

A site promoting an "orb zone theory" claiming that orbs are just dust says that according to such a theory orbs cannot be large than about 10 percent of the photo size (and when you actually photograph dust poured in front of the camera, you don't get orbs larger than about 5 percent of the photo height). But the orb in the photo above is 15% of the original photo height -- an orb too large to be dust.