NGC 7009 


Reference:  The 3-D structure and evolution  of   NGC 7009.

Sabbadin et al. (2004) - A&A 416, 955


The fixed image at the start of the movie corresponds to the nebula as seen from Earth (North is upand East is left).
Each movie is about 80-230 Kby in size (avi) or 110-500 Kby (animated gif).

Rotation around the N-S axis