On: Strange phenomenon in Norwegian sky

[teamonkey]

It wasn't a long exposure. What you're seeing is the fuel/exhaust spreading out and catching the light in the upper atmosphere.

There's two kinds of chemicals. I guess the yellower is compressed liquid oxygen spilling out laterally as the rocket spins. I don't know what the blue is but it's probably the propellant.

[tel → teamonkey]

No, it's still long exposure to catch the winding of the flumes. High speed photography would show each flume as being directional.