There is intense discussion over the subject of �orbs� Have a look at Wikipedia�s description of them:
http://en.wikipedia.org/wiki/Orb_(paranormal)
I�ve always found them fascinating. Whilst I�m not convinced of their paranormal or spiritual connection, I�m always open to thought. However, I will say I have a large number of photos that very clearly have small orbs of different colour light. Years ago I simply discarded the photos, believing I had done lousy job cleaning my lenses. But over the past ten years I�ve paid closer attention to where and when these orbs appear.
It�s interesting to me that yours occurred at a wedding. Last year I attended a Chinese wedding. One of my friends had taken a number of photos of the bride and groom. When he had them processed he was disappointed. He showed me the photos. Without doubt, there were numerous small orbs of different colours surrounding the entire family.
I suppose as a consequence of my profession, I tend to have an inordinate amount of church and cemetery photos. Within the cemetery is where I have the largest number of photos where orbs appear. As I look at them, the majority of the orbs are blue or purple. However, there are numerous orange and white ones as well. I�ve used both digital cameras and film based cameras � anything from a Nikon F80 up to a Mamiya RB67 professional series. Through each of them the imagery recreates itself, reflecting these orbs. Although not intentionally, I�ve taken the photos at different times of day and seasons.
I�ve also had similar experiences in the studio. However, those times are far less than outdoors.
From my technical photographic friends I receive often conflicting answers. Dust, midges, moisture in the air, prism anomalies within the camera, etc. are some of the explanations.