There are many reported types of ghost. In this post I aim to learn about these types and any information about how they appearand my thoughts about what they could logically be.
Ectoplasm / Mist
Apparently look exactly like smoke.But the important characteristic that defines it as a "ghost" is that it has "swirls". Not entirely sure what that means. Anyone who smokes knows that the smoke is constantly swirling around. The following are photo's of ghostly mist.
I still don't quite see what exactly defines these as ghost mists. Maybe if on my investigations I come across something like this I'll understand but for now I'm just going to class it as overreaching for ghostly explanations.
If you want to see more images. The above three were taken from the following sites: