Search found 4 matches
- Wed Dec 11, 2013 4:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Seyfert's Sextet (2013 Dec 10)
- Replies: 92
- Views: 11500
Re: APOD: Seyfert's Sextet (2013 Dec 10)
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...
- Wed Dec 11, 2013 3:38 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Seyfert's Sextet (2013 Dec 10)
- Replies: 92
- Views: 11500
Re: APOD: Seyfert's Sextet (2013 Dec 10)
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...
- Tue Nov 19, 2013 7:17 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Globular Cluster M15 from Hubble (2013 Nov 19)
- Replies: 82
- Views: 7247
Re: APOD: Globular Cluster M15 from Hubble (2013 Nov 19)
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...
- Tue Nov 19, 2013 3:18 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Globular Cluster M15 from Hubble (2013 Nov 19)
- Replies: 82
- Views: 7247
Re: APOD: Globular Cluster M15 from Hubble (2013 Nov 19)
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 ...