APOD: Dust of the Orion Nebula (2012 Feb 06)

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APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby APOD Robot » Mon Feb 06, 2012 5:06 am

Image Dust of the Orion Nebula

Explanation: What surrounds a hotbed of star formation? In the case of the Orion Nebula -- dust. The entire Orion field, located about 1600 light years away, is inundated with intricate and picturesque filaments of dust. Opaque to visible light, dust is created in the outer atmosphere of massive cool stars and expelled by a strong outer wind of particles. The Trapezium and other forming star clusters are embedded in the nebula. The intricate filaments of dust surrounding M42 and M43 appear brown in the above image, while central glowing gas is highlighted in red. Over the next few million years much of Orion's dust will be slowly destroyed by the very stars now being formed, or dispersed into the Galaxy.

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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby bactame » Mon Feb 06, 2012 5:35 am

This image isn't simply striking, its amazing. Stare at it and it becomes three dimensional
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Beyond » Mon Feb 06, 2012 5:35 am

Picturesque is right! And the Horsehead Nebula looks so small. It also looks like the Hubble 'trapped' a picture of a UFO on the right side of the Trapezium picture. :mrgreen:
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Oldfart » Mon Feb 06, 2012 6:49 am

Where is the Horsehead Nebula in this picture?
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby owlice » Mon Feb 06, 2012 7:13 am

Oldfart, it's not in this image.
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Ann » Mon Feb 06, 2012 8:37 am

This is a very fine and interesting picture.

A starforming region like Orion has got to be rich in dust. Dust in itself isn't the necessary raw material for stars - hydrogen gas is - but dust helps to cool the gas, so that it can start contracting. The gas has to contract, so that it can collapse under its own weight and get concentrated enough to get its hydrogen fusion going. In the nearby universe, star formation only happens in the presence of dust.

I wonder how this picture is made. I can't remember seeing such a fine "dust portrait" of Orion before. I also very much appreciate the fact that we are still seeing the familiar bright red and blue nebulae among all the dust.

What an interesting image! :D

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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby saturn2 » Mon Feb 06, 2012 10:12 am

Orion´s dust in the future will be destryed or dispersed into Galaxy ( Milky Way).
Without dust it there isn´t Nebula.
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Flase » Mon Feb 06, 2012 10:47 am

The Great Nebula in Orion is truly an amazing sight. It's even prominent with the naked eye, so I always wonder why it's only the 42nd Messier object. M1 the Crab Nebula is much duller and harder to find. I wonder why he missed it.

I'm sorry I don't like the colours. I don't really like false-coloured images and the pink here is quite gaudy. The following image (linked to in the introduction) seems to have much more realistic colours. The dust is the red of hydrogen emission lines (and as a bonus you have a wider field with the Horsehead Nebula and the amazing Barnard's Loop).
http://apod.nasa.gov/apod/ap070125.html
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Boomer12k » Mon Feb 06, 2012 12:36 pm

God, evidently needs to clean the attic....it is full of DUST!!!

Interesting picture! I love the Orion Nebula.

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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Boomer12k » Mon Feb 06, 2012 12:42 pm

Oldfart wrote:Where is the Horsehead Nebula in this picture?



The Horsehead Nebula is not in this picture. It is way off to the left...see this picture for the direction/location...
http://apod.nasa.gov/apod/ap070125.html

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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby zonalunar » Mon Feb 06, 2012 12:44 pm

A fantastic image, I had no idea there was so much cosmic dust around the Orion Nebula.

Congratulations Nicolás.
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Délicate Frénésie » Mon Feb 06, 2012 12:46 pm

Did anyone noticed the several lines of different angles through the image?

Are they artifacts of the computation used to produce the image?
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby orin stepanek » Mon Feb 06, 2012 1:25 pm

Oldfart wrote:Where is the Horsehead Nebula in this picture?

Hi! Beyond was talking about the Horsehead from one of the links. It's a good idea to check out the links. :) http://apod.nasa.gov/apod/ap090929.html
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Psnarf » Mon Feb 06, 2012 2:49 pm

I prefer today's image. The color combination brings out more of the structure of the dust distribution.

There are maybe half a dozen streaks through the image, more promenent on the full-scale image. Judging by the telescope specs and the two combined images, 900 sec and 450 sec exposures a couple of days apart, methink those streaks are from Earth-orbiting objects passing through the 9.5-degree field of view
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby jerhoad » Mon Feb 06, 2012 2:54 pm

What is the chemical composition of this 'dust'? I'm pretty sure it is not what I find on my baseboards around the house. If it is merely hydrogen, why not just say 'hydrogen'?
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby TNT » Mon Feb 06, 2012 3:03 pm

Flase wrote:The Great Nebula in Orion is truly an amazing sight. It's even prominent with the naked eye, so I always wonder why it's only the 42nd Messier object. M1 the Crab Nebula is much duller and harder to find. I wonder why he missed it.

Probably because he started out looking for comets and recorded the objects that looked like them but weren't. I guess he started looking for other objects that were prominent and recorded them and their location.

Flase wrote:I'm sorry I don't like the colours. I don't really like false-coloured images and the pink here is quite gaudy. The following image (linked to in the introduction) seems to have much more realistic colours. The dust is the red of hydrogen emission lines (and as a bonus you have a wider field with the Horsehead Nebula and the amazing Barnard's Loop).
http://apod.nasa.gov/apod/ap070125.html

I'm no astrophotographer, but I think the colors are caused by the filters used. There are probably other images of the Orion Nebula in different colors. It could have been a visible-light image with long exposures taken to bring out the nebula's natural colors.
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby owlice » Mon Feb 06, 2012 3:17 pm

TNT wrote:There are probably other images of the Orion Nebula in different colors.

Yes, there are; you might like to look here for some.
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Chris Peterson » Mon Feb 06, 2012 3:48 pm

Flase wrote:The Great Nebula in Orion is truly an amazing sight. It's even prominent with the naked eye, so I always wonder why it's only the 42nd Messier object. M1 the Crab Nebula is much duller and harder to find. I wonder why he missed it.

The objects he identified were ones he wanted to avoid confusing with comets. So the order they are presented in his catalog has nothing to do with their prominence.

I'm sorry I don't like the colours. I don't really like false-coloured images and the pink here is quite gaudy.

This isn't a false-color image. It's straight LRGB, meaning the hues approximately match human vision. As always with objects too dim to stimulate color vision, the choice of how saturated to show the colors is entirely arbitrary. No RGB image, from nearly B&W to gaudy color, is more or less "accurate" than any other. All are inaccurate in terms of what the eye can see, so how to present the data is a matter of aesthetics, not science.
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Chris Peterson » Mon Feb 06, 2012 3:55 pm

jerhoad wrote:What is the chemical composition of this 'dust'? I'm pretty sure it is not what I find on my baseboards around the house. If it is merely hydrogen, why not just say 'hydrogen'?

Most of the dust you find around your house is made up of dead skin and other organics. But the dust that blows in from the outside isn't all that different from what you find in a dusty nebula- basically consisting of silicates (although in the details, there are many differences). Also, the dust in a nebula is typically smaller than the dust in your house, and much more tenuous- I'd guess the amount of dust in your house (no reflection on your housekeeping!) would be enough to fill thousands of cubic kilometers in a dusty nebula.
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NOTHING but *DUST*

Postby neufer » Mon Feb 06, 2012 4:04 pm

Code: Select all
GOOD FREND FOR [IE]{SVS}' SAKE FOR[BE]ARE,
 TO DIGG THE DV[ST]   ENCLOASED   [HE]ARE:
 BLESTE BE Ye MAN Yt SPA[RE]S THES STONES,
 AND CVRST *BE HE* Yt MO[VE]S *MY BONES* .
*ST-IE* :: *VE-RE* :: *HE-BE*
--------------------------------------------------------------------
    WASHINGTON IRVING, 1819
    Stratford-On-Avon, Sketch Book.
<<A flat stone marks the spot where the bard is buried. There
are four lines inscribed on it, said to have been written by
himself, and which have in them something extremely AWFUL.

A few years since also, as some laborers were
DIGGing to make an adjoining vault, the earth caved in,
so as to leave a vacant space almost like an ARCH,
through which one might have reached into his grave.
No one, however, presumed to meddle with his remains
so awfully guarded by a malediction; and lest any of
the idle or the curious or any collector of relics should be
tempted to commit depredations, the *OLD SEXTON* kept
watch over the place for two days, until the vault was finished
and the aperture closed again. He told me that he had made
bold to look in at the hole, but could see neither coffin nor
BONES-- *NOTHING but DUST* . It was something,
I thought, to have seen the *DUST of Shakespeare*.>>

    ....................................................................
    *DUST* : *POL-VERE* (Italian)
    --------------------------------------------------------------------
Image
Image
---------------------------------------------------------------------------------
. *HE-BE* , Cup-bearer of the Gods:
http://www.perseus.tufts.edu/Herakles/hebe.html
.
<< *HEBE* was worshipped as a goddess of *PARDONs* or forgiveness; freed
prisoners would *HANG their CHAINS* in the sacred grove of her sanctuary at Phlius.>>
......................................................................................
"[Shakespeare] redeemed his vices with his virtues. There
was *EVER* more in him to be praised than to be *PARDONed* ."

- _On Shakespeare_ (_De Shakespeare Nostrat_) by Ben Johnson
---------------------------------------------------------------------------------
. *ST-IE* has two different definitions:
----------------------------------------------------------------------------
1) *ST-IE* : To ascend ("to heuene?"):
    ......................................................................
    "With bolder wing shall DARE aloft to *STIE* ,
    To the last praises of this Faery Queene."
    -- Edmund Spenser.
    ............................................................................
    "Seie thou not in thin herte, Who schal *STIE* in to heuene?"
    - Romans Chapter 10, Verse 6 (1395) Wyclif:
    ---------------------------------------------------------------------------------
    1) or *ST-IE* : a *PIG PEN* ..... [*PIG* : *SVS* (Latin)]:
      ...................................................................................
        - Hamlet (Quarto 2, 1604-5) Act 3, Scene 4
      Hamlet: Nay but to liue In the ranck sweat of an inseemed bed
      . Stewed in corruption, honying, and making loue
      . *OUER the nasty STIE* .

      .................................................................................
        - Richard the Third (Quarto 1, 1597) Act 4, Scene 5
      Darbie: Sir Christapher, tell Richmond this from me,
      . That in the *STIE of this most bloudie BORE*

      --------------------------------------------------------------------

-------------------------------------------------------------------------------------------------
Horace: "We are but *DUST and SHADOW*."
.
Benjamin Franklin: "Write injuries in *DUST* , benefits in marble."
.
Sir Thomas Browne: "Time which antiquates antiquities,
. and hath an Art to make *DUST* of all things."

-------------------------------------------------------------------------------------------------
This most bloudie BORE: Art Neuendorffer
Last edited by neufer on Mon Feb 06, 2012 4:17 pm, edited 2 times in total.
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby biddie67 » Mon Feb 06, 2012 4:07 pm

Oops ~~ oh, the fates that I must follow the musings of our dear latter-day bard..... BUT, here goes ....

Has any object been found that is a condensing/condensed mass of dust that is reaching the point of fusion?
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby warphead » Mon Feb 06, 2012 4:20 pm

Look at just the central brown area. It's a Teddy Bear!
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby jerhoad » Mon Feb 06, 2012 5:25 pm

Chris Peterson wrote:
jerhoad wrote:What is the chemical composition of this 'dust'? I'm pretty sure it is not what I find on my baseboards around the house. If it is merely hydrogen, why not just say 'hydrogen'?

Most of the dust you find around your house is made up of dead skin and other organics. But the dust that blows in from the outside isn't all that different from what you find in a dusty nebula- basically consisting of silicates (although in the details, there are many differences). Also, the dust in a nebula is typically smaller than the dust in your house, and much more tenuous- I'd guess the amount of dust in your house (no reflection on your housekeeping!) would be enough to fill thousands of cubic kilometers in a dusty nebula.


Thanks Chris - and the obvious followup is: the silcates are the end products of prior star generations? Elements are produced in those explosions; it seems molecules would need a somewhat different environment in which to form. Given the very low concentrations of matter in the interstellar medium, it is quite amazing that these elements find each other and form more complex molecules. But if amino acids can form in the interstellar medium, so can silicates! That's what makes this all so mind-bending!
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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Ann » Mon Feb 06, 2012 5:31 pm

APOD Robot wrote:
Tomorrow's picture: belt venus


Pink above blue?

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Re: APOD: Dust of the Orion Nebula (2012 Feb 06)

Postby Wolf kotenberg » Mon Feb 06, 2012 7:13 pm

Now we need a new image of Eta Carinae, another hot bed of activity. And WR 104.
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