Starship Asterisk*

The 2002 October 4 photo of NGC 6946 is shown as an example of a face-on spiral galaxy; it is not an image of the spiral galaxy that is captured in the image of Seyfert's Sextet. NGC 6946 is in the constellation Cepheus; Seyfert's Sextet is in Serpens. The small spiral galaxy in the background of S...

A bit sorry to chime in on a completely different observation regarding this day's view of Seyfert's Sextet: I notice that in this view, the face-on background galaxy, NGC 6946, looks like a rectangular collection of arms! Not apparent at all in a previous view http://apod.nasa.gov/apod/ap021004.htm...

Globular clusters do have a net angular momentum. They do demonstrate global rotation. There is evidence in some of differential rotation. I'm not sure what you mean by "behave like a galaxy"... Thank you, Chris. Very interesting. By "behave like a galaxy" I meant such phenomena...

I hate to beat a dead horse ( i've asked this before) but these clusters still seem to defy gravity to me. Since they have a spherical symmetry instead of an axial symmetry (like galaxies), they must not have an organiized rotation to amount to anything.... I've wondered something along a parallel ...