NGC 7331 and Stephan's Quintet - Page 2

richardo (Rich) · #21 10-09-2011, 11:30 AM

This is definitely one of the best on this group that I've seen (also mentioned).
Staggering detail Martin, not only to Ngc 7331 but to the quintet as well.
So much going on with these interacting galaxies... also the amount of background galaxies that are being resolved, and, the galactic dust which is floating about.... so much to see in the high res version...

Just splendid... a whole new bar in amateur astro photography..
You must be so pleased with this setup!
This is a definite APOD

All the best
Rich

Ross G · #22 10-09-2011, 04:18 PM

Wow!

Martin, that is one of the most amazing galaxy photos I have ever seen.

Absolutely incredible!

Thank you.

Ross.

DaveM · #23 10-09-2011, 04:49 PM

That is just sensational! I love roaming around the image seeing all the smaller galaxies.

madbadgalaxyman (Robert) · #24 11-09-2011, 10:32 AM

Another galaxy that does not occupy a single plane in space?

I would put my money on the idea that this galaxy's disk, far from being planar (as we would expect from the naive expositions in textbooks), is actually composed of several different rings (annuli) at various position angles.

In my view, this is also the case for the Andromeda Galaxy.

cheers,
bad galaxy man.

P.S. Radio astronomers are very accustomed to modelling the gaseous disk of a galaxy with a "tilted ring model" in which the overall galaxy is made of up several different rings/annuli at various angles to each other.

RobF (Rob) · #25 11-09-2011, 12:17 PM

Gosh, just stunning. There are so many amazing individual objects in there that would make amazing images on their own let alone all together.

So good to have you actively posting again Martin. (Scarey, but but good

)

marco (Marco Lorenzi) · #26 11-09-2011, 12:40 PM

Amazing resolution Martin! I have some reserves on color balance (it looks a bit too gold/brownish to me with the blue part of 7331 a tad magenta) but never the less it is a remarkable image, one of the best on this object I have ever seen..

Marco

Hagar (Doug) · #27 11-09-2011, 01:16 PM

Lovely Martin, What a rich field of galaxies, so many it is hard to count them all. Wonderful as usual.

Octane (Humayun) · #28 11-09-2011, 02:11 PM

Yes, but, what did you think of Martin's image?

Quote:

Originally Posted by madbadgalaxyman

Another galaxy that does not occupy a single plane in space?

I would put my money on the idea that this galaxy's disk, far from being planar (as we would expect from the naive expositions in textbooks), is actually composed of several different rings (annuli) at various position angles.

In my view, this is also the case for the Andromeda Galaxy.

cheers,
bad galaxy man.

P.S. Radio astronomers are very accustomed to modelling the gaseous disk of a galaxy with a "tilted ring model" in which the overall galaxy is made of up several different rings/annuli at various angles to each other.

madbadgalaxyman (Robert) · #29 11-09-2011, 04:17 PM

That's a fair comment about my post, Humayun,
but I have absolutely no talent for describing an image in terms of its aesthetics, beauty, or technical excellence.
I don't look at images from the point of view of the photographer:
A tend to be interested in whether or not the image is deeper or sharper than others of the same object, in that my primary interest is in the actual structure and properties of galaxies.
From my perspective, therefore, an image is good if it reveals some galaxian structures that are not shown in other images.

From this peculiar perspective, Martin's image looks very deep, and I hope to have a careful look at it for details that are not found in other images; only then, perhaps, I can make a more informed comment about the quality of his image (which is obviously very high).

Martin Pugh · #30 12-09-2011, 07:13 AM

Thanks for the comments guys.

Marco - I tend to agree a little bit on the colour. I might just adjust that a little.

cheers
Martin

madbadgalaxyman (Robert) · #31 19-09-2011, 11:45 PM

Martin,

I have never before seen the optically luminous streamer or tidal tail coming from NGC 7320 (in Stephan's Quintet) as clearly as it shows in your image.

What does this feature look like at maximum contrast and brightness?

As I briefly discussed in my contribution to the recent Leonardo70 thread about NGC 7331, there is little reason, in my view, to believe that this galaxy is physically associated with the other members of the Quintet.
(I believe that this is the current scientific consensus on this issue.)

NGC 7320 is at a closely similar redshift to NGC 7331.

Furthermore, your excellent image clearly shows that the tail coming from NGC 7320 is quite distinct from the other tidal material that is seen in the Quintet.

I have just contacted Travis Rector, who recently studied the Quintet with the Gemini Telescope, to ask him what he thinks of the features on your image.

cheers, bad galaxy man

[ I also mention (in case you haven't seen this reference) Arp's picture processing analysis of photographic plates of this field, in the abovementioned post ]

LucasB (Lucas) · #32 20-09-2011, 07:21 PM

Simply amazing! It's the sort of photo you can look around in for an hour at all the detail!

Lucas

TrevorW · #33 20-09-2011, 08:00 PM

Crowded isn't it, a bloody fine image that, well done

SkyViking (Rolf) · #34 20-09-2011, 09:52 PM

My goodness, thats shockingly beautiful, simply stunning! I think this is the best galaxy image I have ever seen from an amateur astronomer. Congratulations Martin on such a great result. There is so much detail everywhere and the colours are fantastic, and lots of interesting tidal streams and background galaxies. Just amazing.
Thanks for sharing this.

TinyBlueDot (John) · #35 23-09-2011, 12:27 PM

Absolute Top Shelf imaging Martin, so much detail, reminds me of the Mandelbrot images where the deeper you go into it, the more you still see - galaxies everywhere. Love it.

John