Paranormal Plunge?

Photo date: January 10, 2016. Photographer: Mark Mahin.

The photo below shows a big orb that seems to be descending downward in the sky on a dry moonless  night.

The photo above is the full original photo, and the orb is ten percent of the photo height. Let's do the math as to whether such an orb might be a suspended dust particle. The area right in front of a camera lens is about 15 millimeters, or 15,000 microns. But the dust particles in outdoor air have a size of only about 1 micron, meaning an average dust particle would block no more than 1/15,000 of the height of the photo. To get a photo like this, you would need a dust particle of about 1500 microns (1.5 millimeters); but even in the worst possible air conditions (which always causes visibility to sharply decrease), suspended dust particles never get bigger than 1000 microns. So we get an "epic fail" using dust to explain a photo like this (see here for more on this type of math).

There was no fog, mist, rain or precipitation on this night.