Orbs can be caused by reflection: . Car headlights · Windows . Glass objects, mirrors, table tops and cabinet doors . Jewelry . Lights of most any kind . Light source outside of your photo that is affecting your image . Moonlight · Polished gravestones · Reflective street signs . Shiny metal such as beverage containers hidden in the grass . Street lamps . Sunlight .
Orbs can be caused by the camera flash reflecting off the highlight of an object: . Dust . Pollen . Insects . Rain droplets
Current theory tells us for an orb to be called an anomaly of sorts it must:
01. Be partially obscured by an identifiable object in the foreground. 02. The obscuring object in the foreground must be darker than the orb. 03. There must be no change of color where the foreground object obscures the orb.