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Sh2-86 (NGC-6820)

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Hercules M-13 Question?

Started by Midnight Sun, 09/24/2006 05:48AM
Posted 09/24/2006 05:48AM Opening Post
Is this bright cluster inside or outside our Galaxy? My Son asked me this and I wasn't sure... thank you, JM

Posted 09/24/2006 07:43AM | Edited 09/24/2006 07:44AM #1
It is insude our galaxy. Open clusters are mainly in the galactic plane, globular clusters swarm around the galaxy centre like a halo. Globular clusters in our nearest neighbour galaxies can also be seen, but they appear very small, almost stellar.

http://www.thinkastronomy.com/M13/common/examples_assets/M13.jpg

Dmitri
Posted 09/24/2006 12:44PM #2
Hi John --

Your son asks good questions. M13 is definitely outside of the galactic plane but is still part of our home galaxy. Most globular clusters are above/below the galactic plane also. Dmitri's link will bring you to a program I recently downloaded and like a lot. The inexpensive program adds a whole new dimension to what we can learn about the location of telescopic objects. -- great stuff.

Bob Polcyn