My thoughts here are that both orbs are most likely paranormal/spiritual in nature. Just my opinion, and certainly not a scientifically proven fact. But, I do agree with Damien that the mere presence of an orb does not necessarily mean it is a haunting, even though orbs may be found in places that are very haunted.
Spirits are present all around us, and they are probably here for many reasons. I believe that they make themselves visible for a variety of reasons... sometimes just because they may simply be curious about what we are doing. For instance, we seem to get many more orb pictures in our house around the holidays. I think they like to join in the festivities. Orbs seem to be fond of my son, and we even have a pic of him with a small orb exiting his nose. Orbs also like to sit on my husband's head. Sounds crazy, but it happens quite often. =)
Soda Can orb: Personally, I don't feel that being in front of or behind the soda can makes any difference here, as I believe that a paranormal orb OR a piece of dust could just as easily be in front of OR behind the soda can.
Another thing that I find in the cases of both dust and moisture, is that there are usually several of these kinds of orbs in any given picture. Dust and moisture tends to be present in a large number of particles or droplets in the air, and not just one. I feel that when it is just a single orb in a picture, there is a stronger chance that it is paranormal, and I examine it more closely.
One thing to remember about any of the pictures posted is that everyone is giving just an OPINION, and none of us can prove any of these things to a scientific certainty, at least not with the technology that we have today. That is part of what makes photographing things that may be paranormal so interesting.... we are on a new frontier, so to speak, of finding more answers to an age old mystery... do ghosts/spirits really exist? I am one person of many in the world who believes that they do, My reasons for believing this are many, and I find it exciting that even non-scientists can join in on the search for more definitive answers. There is still much to be discovered, and a great deal of things to be learned about the paranormal, and I find that fascinating.
So, opinions of others may not always be what we want to hear, but we must bear in mind that they are simply opinions. No one is right or wrong in this... we all see it a bit differently. But, we are all here to learn from one another, and we can only do that by examining ALL opinions for the grains of truth that may or may not be there. Each of us needs to go by our gut feelings/psychic impressions on so much of this. But, the great pictures are there, all around us... and all we have to do is snap them, and we never know what we will get, even in the familiar surroundings of our own homes.
Thanks for sharing your pics, Brauvura, and keep on taking them! These were interesting! We love seeing them, and, don't be put off by opinions that might be different than your own.
Mare