Hi there
I dont know what they are either, but i have heard of them before.I have a weird story too, one night me, my girlfriend and my DF where outside drinking and we where mucking around taking photos, we took lots of photos of each other and stuff. There was this one particular photo taken of me and all around me where what they call orbs that is the only thing we could think they where. We couldnt explain it, we had taken so many photos and of others in the same chair and there was nothing around them.
i cannot explain this and at the time it freeked me out ( the wine didnt help lol) but now i like to think of it as my family ( that have passed) watching me and being around me.