Re: Comet Tails
I agree, I witnessed them. However, I often witness two, or three "tails" in Ice Fog in Alaska. Usually each is slighly different in color. On the multiple tails of a comet, usually one is slighly different in color as well. Again, this looks more like light refraction. In the right kind of Ice fog, the tail will show up as a rainbow, or occasionally as a circular rainbow if the source of light is aimed at the viewer.
On a comet the outgassing occurs but it doesn't go away, the outgassed material may move millions of miles away from the comet, but it is still co-orbiting. Only the material which gets far enough away to become bound to another gravitational force is lost by the comet and it's co-orbiting mass of sublimated water and dust.