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NGC 2359, the "Snail Nebula", more grrr

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#1 17.5Dob

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Posted 22 August 2014 - 11:50 PM

I coined this phrase back in the early 80's, while observing it with my 17.5 Dob. I've never been able to see "Thor's Helmet", it's "new" familiar name. It will always look like a snail to me.

Thors Helmet or a Snail, you decide ?

600px-NGC_2359.jpg


Edited by 17.5Dob, 22 August 2014 - 11:54 PM.


#2 Feidb

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Posted 23 August 2014 - 12:15 AM

To me it's Thor's Helmet. I've never heard it called the Snail before. I see it's purely in the eye of the beholder. I also see what you mean from the photo but it certainly doesn't look like that visually.



#3 David Knisely

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Posted 23 August 2014 - 12:17 AM

To me, NGC 2359 has always looked like an oval bubble of nebulosity with a bar-like segment flowing off the southern side extending to the west-southwest.  One other common name for this object is the "Duck Nebula", with the southern bar being the duck's bill.  Other than the southern bar and its slight extension, the fainter "strap" filaments which give the object its name are harder to see, as they are fairly faint, requiring at least a narrow-band nebula filter and some aperture to be seen with any certainty.  I have barely picked up two or three of them under very dark skies in my 10 inch with a narrow-band nebula filter, but even in my 14 inch, the outer filaments don't show up all that brightly, although with some study (and my NPB filter), I can see that they are there.  Clear skies to you. 


Edited by David Knisely, 23 August 2014 - 12:40 PM.


#4 17.5Dob

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Posted 23 August 2014 - 12:18 AM

 it's purely in the eye of the beholder. I also see what you mean from the photo but it certainly doesn't look like that visually.

 

In my 17.5" ,with a UHC filter in a grey zone, it looks very much like that, hence my term for it !


Edited by 17.5Dob, 23 August 2014 - 12:21 AM.


#5 jethro

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Posted 23 August 2014 - 07:21 AM

The image reminds me of the head of a man with a goatee.



#6 Jon_Doh

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Posted 23 August 2014 - 07:38 AM

Looks like Rocky from Bullwinkle.



#7 jethro

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Posted 23 August 2014 - 07:47 AM

You have a strange imagination. :bigshock:



#8 tigerroach

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Posted 23 August 2014 - 08:14 AM

From the photo, I can see the snail. 

 

I havent seen it in the scope. Need to fix that. 



#9 jethro

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Posted 23 August 2014 - 09:00 AM

Of course, it also looks like Princess Leia from Star Wars.

With a goatee...



#10 Starman1

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Posted 23 August 2014 - 10:16 AM

I always see three tendrils of nebulosity extending away from the central bubble.

And I always see some additional nebulosity in the field, so for me it doesn't resemble

A Wagnerian helmet, or a snail or anything of the sort.

It resembles NGC2359, one of the finest Wolf-Rayet excitation nebulae in the sky.

Spectacularly detailed when using an O-III filter, the trick is to see the tendrils inside of the bubble,

which always seem to vary in visibility from night to night.



#11 jethro

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Posted 23 August 2014 - 10:27 AM

Don, you just ruined my thoughts about the Princess.



#12 kfiscus

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Posted 23 August 2014 - 10:27 AM

Totally a snail, complete with swirl in shell.



#13 Starman1

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Posted 23 August 2014 - 01:03 PM

What, then, are the two nebula extensions that go to the upper and lower left in the photo?

Exhaust? :lol:

These are visible visually.



#14 Ptarmigan

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Posted 23 August 2014 - 01:33 PM

It does look like Thor's helmet. I can also see a snail.



#15 youngamateur42

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Posted 24 August 2014 - 12:47 AM

This is one that has always intrigued me but I have yet to see it. Soon as I get a better filter I hope to catch it this winter.

#16 Jon Isaacs

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Posted 24 August 2014 - 06:43 AM

This is one that has always intrigued me but I have yet to see it. Soon as I get a better filter I hope to catch it this winter.

 

It's definitely a dark sky object... 

 

Jon








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