Butterfly to Crescent nebula panorama as a stereoscopic 3D pair.

Parallel vision 3D

Cross vision 3D

Original 2D:

http://astroanarchy.blogspot.com/2011/06/panorama-from-butterfly-to-crescent.html

Other 3D-formats:

http://astroanarchy.zenfolio.com/f359296072

A scale study of an apparent size of NGC6888, the "Crescent Nebula"

http://astroanarchy.blogspot.com/2011/05/crescent-nebula-ngc6888-apparent-scale.html

NOTE! This is a personal vision about forms and shapes, based on some known facts and an artistic impression.