APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

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Expand view Topic review: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by starsurfer » Sun May 18, 2014 11:36 am

Nitpicker wrote:The first time I ever had sweet potato pie was at my first ever thanksgiving celebration in 1998. I have always loved sweet potato/yam/kumera, but as a savoury dish, especially with a roast dinner. This sweet potato pie was a dessert and baked with marshmallows on top, and I remember thinking it was a waste of two good things. (I still ate it, but I think it is a weird pie. You crazy Americans!)

Potato pie, on the other hand, as I understand it, is any kind of potato concoction in a pie or casserole dish, baked in the oven. I like mine scalloped, without a base, layered with cheese and garlic and rosemary and baked [facing magnetic north] until crispy golden brown . Also nice with beef in a pastry base, with mashed potato on top, for a shepherd's pie. I agree starsurfer, delicious.
Potato pie is amazing! I have never had sweet potato pie nor would I ever want to. A potato pie with potato mixed with meat and cheese with a thick layer of cheese on top is divine!

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Beyond » Sat May 17, 2014 11:42 am

Good for you. :lol2:

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Nitpicker » Sat May 17, 2014 11:38 am

Beyond wrote:I don't think being baked in the magnetically north direction is going to help that concoction at all. :no: :signed: a non-crazy American.
Just being jovial.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Beyond » Sat May 17, 2014 11:36 am

I don't think being baked in the magnetically north direction is going to help that concoction at all. :no: :signed: a non-crazy American.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Nitpicker » Sat May 17, 2014 10:38 am

The first time I ever had sweet potato pie was at my first ever thanksgiving celebration in 1998. I have always loved sweet potato/yam/kumera, but as a savoury dish, especially with a roast dinner. This sweet potato pie was a dessert and baked with marshmallows on top, and I remember thinking it was a waste of two good things. (I still ate it, but I think it is a weird pie. You crazy Americans!)

Potato pie, on the other hand, as I understand it, is any kind of potato concoction in a pie or casserole dish, baked in the oven. I like mine scalloped, without a base, layered with cheese and garlic and rosemary and baked [facing magnetic north] until crispy golden brown . Also nice with beef in a pastry base, with mashed potato on top, for a shepherd's pie. I agree starsurfer, delicious.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Beyond » Fri May 16, 2014 3:26 pm

starsurfer wrote: I meant that the original image on Jason Jennings website is different to the main APOD image. However, I'm sure we can all agree that potato pie is delicious. :D
Do you mean potato pie, or sweet potato pie? I've never heard of potato pie, but sweet potato pie can be very good, depending on what's put in it. Most sweet potato pie makers put in way to much spices, for my taste.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by starsurfer » Fri May 16, 2014 3:20 pm

Nitpicker wrote:I don't mind which way an image like this is rotated, but I will admit that I prefer to be provided with an indication of the North direction (Celestial if unspecified). If I study an image closely, I tend to rotate it several different ways, to compensate for the limitations of my brain. I also try to avoid "sky only" images presented in "portrait" orientation, as they are not as well suited to the "landscape" orientation of most computer screens.

It is evidently too much to ask of every author of every astrophotograph, to always present North up. It is therefore highly unreliable to assume that North is always up, and with no other indication, we are left to always figure it out ourselves -- which many of us seem to enjoy doing anyway -- by which time we know which way North is. I always prefer to have an indication of the North direction, but it doesn't have to be up. Regardless, authors are entitled to their own preferences and conventions (or lack thereof) as this sort of image making has a significant artistic component.
There isn't a right or wrong way to rotate an image but I prefer seeing some objects presented in north up and some not in north up. Just an interesting personal quirk.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by starsurfer » Fri May 16, 2014 3:18 pm

Nitpicker wrote:
starsurfer wrote:
Nitpicker wrote:
And I'm a nitpicker and Galactic North is different from Celestial North. Galactic North is up (more or less) in the full frame APOD, as it was when originally published on Jason Jennings' website.
I was talking about celestial north! Also the orientation of the image on APOD and then on Jason Jennings website is different. This discussion has been wonderful! Now I have some idea of what Ann feels when she commentates on colour. What a wonderful and brilliant community this is! Group hug everyone! :D
Sorry starsurfer, but you have completely misunderstood me. I know full well you were talking about Celestial North. And I know that the "main page" of this APOD has Celestial North up. But my point was twofold:

a) That the "main page" APOD is rotated from the "full frame" APOD and the "full frame" matches the original image published on Jason Jennings' website, which has Galactic North up (more or less).

b) It doesn't really matter which way is up, or which North is North. It is a silly thing to criticize, as it is the author's prerogative.
I meant that the original image on Jason Jennings website is different to the main APOD image. However, I'm sure we can all agree that potato pie is delicious. :D

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Nitpicker » Thu May 15, 2014 10:59 pm

I don't mind which way an image like this is rotated, but I will admit that I prefer to be provided with an indication of the North direction (Celestial if unspecified). If I study an image closely, I tend to rotate it several different ways, to compensate for the limitations of my brain. I also try to avoid "sky only" images presented in "portrait" orientation, as they are not as well suited to the "landscape" orientation of most computer screens.

It is evidently too much to ask of every author of every astrophotograph, to always present North up. It is therefore highly unreliable to assume that North is always up, and with no other indication, we are left to always figure it out ourselves -- which many of us seem to enjoy doing anyway -- by which time we know which way North is. I always prefer to have an indication of the North direction, but it doesn't have to be up. Regardless, authors are entitled to their own preferences and conventions (or lack thereof) as this sort of image making has a significant artistic component.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Chris Peterson » Thu May 15, 2014 2:17 pm

starsurfer wrote:I was talking about celestial north! Also the orientation of the image on APOD and then on Jason Jennings website is different. This discussion has been wonderful! Now I have some idea of what Ann feels when she commentates on colour. What a wonderful and brilliant community this is! Group hug everyone! :D
I'm with you. I prefer images that maintain the convention of north up. I think it's a fair criticism when an image is presented with a different rotation. But I also agree that the imager has every right to use whatever orientation he wants. Rotation isn't that big of a deal. There are good reasons to present an image north up, but it isn't "wrong" to do otherwise.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Nitpicker » Thu May 15, 2014 11:26 am

starsurfer wrote:
Nitpicker wrote:
starsurfer wrote: I meant that the full image on the original website isn't north up. Just as Ann is a colour commentator, I'm an orientation commentator.
And I'm a nitpicker and Galactic North is different from Celestial North. Galactic North is up (more or less) in the full frame APOD, as it was when originally published on Jason Jennings' website.
I was talking about celestial north! Also the orientation of the image on APOD and then on Jason Jennings website is different. This discussion has been wonderful! Now I have some idea of what Ann feels when she commentates on colour. What a wonderful and brilliant community this is! Group hug everyone! :D
Sorry starsurfer, but you have completely misunderstood me. I know full well you were talking about Celestial North. And I know that the "main page" of this APOD has Celestial North up. But my point was twofold:

a) That the "main page" APOD is rotated from the "full frame" APOD and the "full frame" matches the original image published on Jason Jennings' website, which has Galactic North up (more or less).

b) It doesn't really matter which way is up, or which North is North. It is a silly thing to criticize, as it is the author's prerogative.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by starsurfer » Thu May 15, 2014 10:42 am

Nitpicker wrote:
starsurfer wrote:
Nitpicker wrote:
Galactic North is up (more or less) in the full frame APOD, as it was when originally published. It is also orientated (more or less) as one observes it relative to the horizon on an April evening (when captured). I think anyone who can produce an image like this has earned the right to rotate it however they like. (I might baulk at a mirror image, but we all have our issues.)
I meant that the full image on the original website isn't north up. Just as Ann is a colour commentator, I'm an orientation commentator.
And I'm a nitpicker and Galactic North is different from Celestial North. Galactic North is up (more or less) in the full frame APOD, as it was when originally published on Jason Jennings' website.
I was talking about celestial north! Also the orientation of the image on APOD and then on Jason Jennings website is different. This discussion has been wonderful! Now I have some idea of what Ann feels when she commentates on colour. What a wonderful and brilliant community this is! Group hug everyone! :D

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Beyond » Thu May 15, 2014 12:13 am

See what I mean?? :lol2:

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Nitpicker » Thu May 15, 2014 12:00 am

Another little factoid I read the other day, is that an early convention of map making was to show East up, and that this was the origin of the term "orientation" ... East = Orient.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Beyond » Wed May 14, 2014 9:43 pm

Nitpicker wrote:And I'm a nitpicker and Galactic North is different from Celestial North. Galactic North is up (more or less) in the full frame APOD, as it was when originally published on Jason Jennings' website.
And a very good picker of nits you are! In brightest day, in darkest night, no un-picked nit shall escape your sight.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Nitpicker » Wed May 14, 2014 9:17 pm

starsurfer wrote:
Nitpicker wrote:
starsurfer wrote:Jason Jennings has been long overdue for an APOD for many years now! Magnificent image of one of the strangest areas of the southern sky. I believe the first major image of this was the AAO image by David Malin. The full frame of this image is incredible showing many more dust clouds and another galaxy. The only criticism about the full image is it isn't oriented north up like it is in this APOD.
Galactic North is up (more or less) in the full frame APOD, as it was when originally published. It is also orientated (more or less) as one observes it relative to the horizon on an April evening (when captured). I think anyone who can produce an image like this has earned the right to rotate it however they like. (I might baulk at a mirror image, but we all have our issues.)
I meant that the full image on the original website isn't north up. Just as Ann is a colour commentator, I'm an orientation commentator.
And I'm a nitpicker and Galactic North is different from Celestial North. Galactic North is up (more or less) in the full frame APOD, as it was when originally published on Jason Jennings' website.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by starsurfer » Wed May 14, 2014 9:09 pm

owlice wrote:
starsurfer wrote:Jason Jennings has been long overdue for an APOD for many years now!
APOD is not a contest, however much some people want to think it is, and no one is "due" an APOD. That stupid notion needs to die; please do not resuscitate it. Thanks.
It was just a bad choice of words, I was really overexcited! :D

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by starsurfer » Wed May 14, 2014 9:08 pm

Nitpicker wrote:
starsurfer wrote:Jason Jennings has been long overdue for an APOD for many years now! Magnificent image of one of the strangest areas of the southern sky. I believe the first major image of this was the AAO image by David Malin. The full frame of this image is incredible showing many more dust clouds and another galaxy. The only criticism about the full image is it isn't oriented north up like it is in this APOD.
Galactic North is up (more or less) in the full frame APOD, as it was when originally published. It is also orientated (more or less) as one observes it relative to the horizon on an April evening (when captured). I think anyone who can produce an image like this has earned the right to rotate it however they like. (I might baulk at a mirror image, but we all have our issues.)
I meant that the full image on the original website isn't north up. Just as Ann is a colour commentator, I'm an orientation commentator.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by owlice » Tue May 13, 2014 5:48 pm

Mactavish, it's a gorgeous image -- no doubt about that -- but to say that someone, anyone, has been "long overdue" for something which no one is "due" is nonsensical.

If you wish to discuss this further, PM me. Thanks.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Mactavish » Tue May 13, 2014 5:35 pm

owlice wrote:
starsurfer wrote:Jason Jennings has been long overdue for an APOD for many years now!
APOD is not a contest, however much some people want to think it is, and no one is "due" an APOD. That stupid notion needs to die; please do not resuscitate it. Thanks.
Okay, you made your point. I don’t believe, though, that Starsurfer considers APOD to be a contest. Rather, he pays a well-deserved compliment to Jennings. I see nothing in his comment that is “stupid.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Chris Peterson » Tue May 13, 2014 5:20 pm

Ron-Astro Pharmacist wrote:The link to "dusty" caught my eye and, upon reading, it was very thought provoking. Interstellar dust appears to be quite the stuff. It seems conceivable that through gravitational rotation and random interactions that helical structures could evolve. Anyone know how much the idea has been investigated as the stuff of life?
We have no observational evidence I'm aware of for gravitationally created helical structures. There may be helical structures associated with very energetic events like novas and supernovas, as well as within jets. But not in gravity dominated dust clouds.

At the molecular scale, gravity is not a factor at all. The shapes of molecular structures are dictated by electromagnetic forces.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Ron-Astro Pharmacist » Tue May 13, 2014 5:13 pm

The link to "dusty" caught my eye and, upon reading, it was very thought provoking. Interstellar dust appears to be quite the stuff. It seems conceivable that through gravitational rotation and random interactions that helical structures could evolve. Anyone know how much the idea has been investigated as the stuff of life?

http://www.space.com/13401-cosmic-star- ... ounds.html

Obviously some have but others may have refuted the concept scientifically. We had some interesting beginning but I might gravitate to give it my vote as "Most Desirable". At least given the choice philosophically over Earth-based hypotheses as it might mean life could be prevalent thus more likely discovered in my lifetime. That would also get my vote.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by geckzilla » Tue May 13, 2014 3:28 pm

Yup. I'm just happy when they get something with less than 7 numbers in them. The 2MAS and IRAS designations are useful in lieu of anything else but it sure is clumsy to write about them. For example, there is apparently another tiny galaxy behind ESO 257-19... It's called 6dFGS gJ073507.6-465543 (also part of a survey, of course.)

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by Chris Peterson » Tue May 13, 2014 3:04 pm

geckzilla wrote:It's catalogued as ESO 257-19 (among a few other things) in SIMBAD.
I'm not surprised, given the proliferation of deep, fast surveys in recent years. I note that every published reference to this object is some sort of survey, catalog, or statistical study. Nobody has looked at it closely because of some unusual characteristic. It's just another face in the crowd.

Re: APOD: CG4: A Ruptured Cometary Globule (2014 May 13)

by owlice » Tue May 13, 2014 3:01 pm

starsurfer wrote:Jason Jennings has been long overdue for an APOD for many years now!
APOD is not a contest, however much some people want to think it is, and no one is "due" an APOD. That stupid notion needs to die; please do not resuscitate it. Thanks.

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