Norway Spiral- was it due to a rocket launch?

Blogs are buzzing today about the odd, suspiciously perfect spiral shape seen in the night sky over Norway on December 8th-9th.

Although many people cried “shopped!” almost immediately, the image was carried across the Norwegian news from several different sources and appears to at least be an accurate version of what appeared in the sky- although what may have caused it is up for debate. A blog on the Seattle Post-Intelligencer quotes an astronomer who believes the phenomenon may have been caused by a rocket launch:

…(Phil) Plait said: “A rocket got out of control, perhaps losing a stabilizer, and started to spiral. The two spirals, different in shape, size, and color, indicate something happened in the middle of all this (the rocket second stage fired while still spinning, or something else started leaking out), changing the rocket’s direction. Then, when the fuel or whatever ran out, the white spiral began to disappear from the inside out as the material expanded in space.”

The blog goes on to posit that the most likely suspects in such a scenario are the Russians, but that they’re denying it. Wired guessed it was viral marketing for the newish showV.The Daily Mail thinks a missile/rocket is likely too, but isn’t discounting UFOs as a cause for the light show.

Check out video below of the incident- what’s your theory?