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Space Forum / Astronomy / September 2005Eagle Nebular ???
Its size I'm told is 50 LY,and its about 7,000 LY from me(fine) I look at it every morning,and always wanted to ask this question. How did it create such a shape? Why do points,or lumps stick out of this cloud? Some are very fine features. On its Eagle head top it looks hairy,and causes light behind to look fuzzy. kind of like looking through a hair brush. Could we super impose pictures taken at the same angle and see how the structure of the hydrogen,helium cloud is changing? My mind keeps telling me nebular clouds should be in the shape of a ball. Not 50 LY long. Even shaped like a frisbee makes more sense.to me Beert herbertglazier@webtv.net (G=EMC^2 Glazier) wrote in news:20998-4328AA5A-106 @storefull-3336.bay.webtv.net: > Its size I'm told is 50 LY,and its about 7,000 LY from me(fine) I look > at it every morning,and always wanted to ask this question. How did it > create such a shape? Why do points,or lumps stick out of this cloud? Once massive stars form, they tend to disperse the nearby nebula due to radiation pressure and high speed "solar winds". The nebula gets sculpted by the stars it forms. Futher to this, the supermassive stars eventually detonate as type II supernova, the resulting shock triggering more star formation. Klazmon. > Its size I'm told is 50 LY,and its about 7,000 LY from me(fine) I look > at it every morning,and always wanted to ask this question. How did it [quoted text clipped - 5 lines] > keeps telling me nebular clouds should be in the shape of a ball. Not > 50 LY long. Even shaped like a frisbee makes more sense.to me Beert "Eagle Nebula" Bert. "Nebular" is an adjective, "Nebula" is the noun. > Its size I'm told is 50 LY,and its about 7,000 LY from me(fine) I look > at it every morning,and always wanted to ask this question. How did it [quoted text clipped - 5 lines] > keeps telling me nebular clouds should be in the shape of a ball. Not > 50 LY long. Even shaped like a frisbee makes more sense.to me Beert Hi Bert, there was a very good webcast/talk over at STSci about the Eagle and the way those clouds are probably formed but I'm damned if I can remember which one it was. It would seem it's to do with surrounding stars and the pressure they exert on the dust clouds. Above the top of a columm there is likely star formation activity that has 'blown' the dust into that kind of shape. Also with star formation going on within the dust clouds 'blowing' the dust about adds to the effect. Wish I could remember which documentary it was It would be worth watching again. Hi Ray I don't have pictures of the Lagoon,or the Trifid Nebula's but know their rounded shape fits better as to a shape they should conform to(I would think). I can see how denser areas of gravity can alter their shapes. The Eagle is just to elongated. I see beauty in all of them. Their size is very impressive,for I do remember that the Lagoon was 130 LY in size. Seems if a supernova went of in their middle area it would alter the shape greatly. I would expect to see a big hole. (smoke ring) Bert > Hi Ray I don't have pictures of the Lagoon,or the Trifid Nebula's but > know their rounded shape fits better as to a shape they should conform [quoted text clipped - 4 lines] > it would alter the shape greatly. I would expect to see a big hole. > (smoke ring) Bert Hi Bert, if you go here to the Hublle site, there is a tiny search box towards the top, type in lagoon or trifid and you will get to some really good pictures. There are different size files available for download, some small some large. There's also plenty of great pictures to be had there. These nebula pictures are some of the most stunning to view. http://hubblesite.org/ Hi Ray The Hubble shows those two nebula as rounded,and I like that. Might throw one of my very old ideas in here(a dart) What nebula do for the macro realm,Fields do for the micro realm. They create complex structures. Bert > Hi Ray The Hubble shows those two nebula as rounded,and I like that. > Might throw one of my very old ideas in here(a dart) What nebula do for > the macro realm,Fields do for the micro realm. They create complex > structures. Bert It's difficult to keep in mind the scale of it when you look at those images. I wonder what it would look like from a star system within the cloud or right up close on the edge, might not see much ;-) I was looking at high resolution pictures of M51 the other day, when you zoom in real close and look between the arms you can see structure of the dust clouds that look just like the structure of a shell, well to me anyway. Rather like macro and micro being similar. Hi Ray Yes I( have M51 hanging on a wall. It is like looking straight down into a whirlpool. That'[s even how they named it. With that face-on view you can also realize why it was one of the first spiral galaxies identified. Arms of spiral galaxies are interesting. They are the birth places of new stars so they are blue while the bulge are home to older,redder stars. The galaxy M74 is interesting because its arms are more open than any spiral galaxy picture I have ever studied. Getting my thoughts back to the space between the arms there must be great clouds with lots of space dust to be responsible for all that defused(smoky) light. Beert > Hi Ray Yes I( have M51 hanging on a wall. It is like looking straight > down into a whirlpool. That'[s even how they named it. With that face-on [quoted text clipped - 6 lines] > with lots of space dust to be responsible for all that defused(smoky) > light. Beert Yeah Bert, thanks for pointing out M74 had to look it up, I'm useless at remembering all these numbers. But again if you zoom in and look closely between the arms of M74 you can see what look like filaments of dust stretching between the arms, they are also curved. It just looks like what one sees in a shell. Not so prominent in M74 but I'm damn sure I can see it.. What it would look like is a bright and dark fog. If you're lucky, there may be a hole or two where you can see out a little farther. Saul Levy >It's difficult to keep in mind the scale of it when you look at those >images. I wonder what it would look like from a star system within the >cloud or right up close on the edge, might not see much ;-) > Hi Ray I don't have pictures of the Lagoon,or the Trifid Nebula's but > know their rounded shape fits better as to a shape they should conform [quoted text clipped - 4 lines] > it would alter the shape greatly. I would expect to see a big hole. > (smoke ring) Bert From what we know about these nebulae, Bert, it seems to me that the rounder (more spherical) they appear to us, the younger they would probably be. That is, the more star formation that takes place, the less it would be round, and the more out-of-shape it would be. What intrigues me is the astral mechanism which creates the cloud in the first place! and also, what was the origin of the mechanism. happy days and... starry starry nights!  SignatureInvisible the hand which builds a spinning galaxy, Unseen the busy fingers bursting stars so tenderly, We may not see the fireballs who sizzle thru our skies, Oh! what the use for us to have such dark, unlucky eyes? I note the need with night's approach on sparkling starlit sea. Indelibly yours, Paine http://www.savethechildren.org/ http://www.painellsworth.net Hi Painius Right you are,for when they say the universe is so uniform the Hubble shows us great nebular gas clouds to make that thinking fuzzy. Hydrogen gas is not spread evenly. A gas that clumps to me is mysteries. My mind tells me the Eagle nebular should get rounder over time,but that is not the case. My mind tells me it should look more uniform,but I can find rain clouds to fit the way it looks. Maybe when the Milky Way was young,and nebular were even more massive and dense there shape was different ?? I wonder if stars are created in pairs?. For the Milky Way to end up with billions of stars the same age gravity must have had a field day 4.5 billion years ago. Beert |
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