APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

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APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by APOD Robot » Wed Dec 19, 2012 5:06 am

Image NGC 5189: An Unusually Complex Planetary Nebula

Explanation: Why is this nebula so complex? When a star like our Sun is dying, it will cast off its outer layers, usually into a simple overall shape. Sometimes this shape is a sphere, sometimes a double lobe, and sometimes a ring or a helix. In the case of planetary nebula NGC 5189, however, no such simple structure has emerged. To help find out why, the Earth-orbiting Hubble Space Telescope recently observed NGC 5189 in great detail. Previous findings indicated the existence of multiple epochs of material outflow, including a recent one that created a bright but distorted torus running horizontally across image center. Results appear consistent with a hypothesis that the dying star is part of a binary star system with a precessing symmetry axis. Given this new data, though, research is sure to continue. NGC 5189 spans about three light years and lies about 3,000 light years away toward the southern constellation of the Fly (Musca).

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by ta152h0 » Wed Dec 19, 2012 5:15 am

more than one kaboom in the neighborhood. The big poobah in the sky decided to toy with the smart ones populating the small lens on their telescope
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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by bystander » Wed Dec 19, 2012 5:18 am

Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor

Björn

Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Björn » Wed Dec 19, 2012 9:03 am

I think it has a fish-like appearance with a big head and a long tail-like body

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by saturno2 » Wed Dec 19, 2012 10:55 am

NGC 5189 Complex Planetary Nebula
Indeed. A complex structure con different colors: white, blue,
yellow and brown.

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Indigo_Sunrise » Wed Dec 19, 2012 11:35 am

Ethereal comes to mind....


IOW: very nice!
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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by neufer » Wed Dec 19, 2012 11:59 am

Björn wrote:
I think it has a fish-like appearance
with a big head and a long tail-like body
You're just being coy.
Art Neuendorffer

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by ritwik » Wed Dec 19, 2012 12:14 pm


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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Boomer12k » Wed Dec 19, 2012 1:35 pm

Björn wrote:I think it has a fish-like appearance with a big head and a long tail-like body
I am thinking SHENRON the dragon on Dragonball Z. :D

Did you also see the CHRISTMAS TREE above center.

Awesome pic.

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Boomer12k » Wed Dec 19, 2012 1:39 pm

Could what we see also be the affect of filters. I have seen other planetary nebula in different light and time exposures to give a totally different depiction of the Nebula.

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Ann » Wed Dec 19, 2012 3:33 pm

Boomer12k wrote:Could what we see also be the affect of filters. I have seen other planetary nebula in different light and time exposures to give a totally different depiction of the Nebula.

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Absolutely, the filters affect the appearance of the nebula immensely.

On another note, and with apologies to William Blake...

Plane! Tary! burning bright
In the vastness of the night
What immortal hand or eye
Could frame thy fearful symmetry?


Ann
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jonpugh

Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by jonpugh » Wed Dec 19, 2012 3:53 pm

Flip it horizontally (i.e. view it from the other side) and it's obviously Krypton.

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by StarCuriousAero » Wed Dec 19, 2012 8:55 pm

I saw a splashing fish as well... and maybe a scorpion? And an angry face being punched in the eye?

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by ta152h0 » Wed Dec 19, 2012 9:18 pm

to our ancient ancestors, unpoluted by artificial light, this object would just be another dot of light, right ?
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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by neufer » Wed Dec 19, 2012 10:25 pm

ta152h0 wrote:
to our ancient ancestors, unpolluted by artificial light, this object would just be another dot of light, right ?
  • Only if they had telescopes.

    (At the distance of NGC 5189 a 104 solar luminosity star would barely be visible.)
http://en.wikipedia.org/wiki/Asymptotic_giant_branch#Circumstellar_envelopes_of_AGB_stars wrote: <<The asymptotic giant branch is the region of the Hertzsprung-Russell diagram populated by evolving low to medium-mass stars. This is a period of stellar evolution undertaken by all low to intermediate mass stars (0.6–10 solar masses) late in their lives.

Observationally, an asymptotic giant branch (AGB) star will appear as a red giant. Its interior structure is characterized by a central and inert core of carbon and oxygen, a shell where helium is undergoing fusion to form carbon (known as helium burning), another shell where hydrogen is undergoing fusion forming helium (known as hydrogen burning) and a very large envelope of material of composition similar to normal stars.

The extensive mass loss of AGB stars means that they are surrounded by an extended circumstellar envelope (CSE). Given a mean AGB lifetime of one Myr and an outer velocity of 10 km/s, its maximum radius can be estimated to be roughly 3×1014 km (30 light years). This is a maximum value since the wind material will start to mix with the interstellar medium at very large radii, and it also assumes that there is no velocity difference between the star and the interstellar gas. Dynamically most of the interesting action is quite close to the star, where the wind is launched and the mass loss rate is determined. However, the outer layers of the CSE show chemically interesting processes, and due to size and lower optical depth are easier to observe.
Art Neuendorffer

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Guestation » Wed Dec 19, 2012 11:23 pm

Maybe a double star each exploding simultaneously.

Guestation

Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Guestation » Wed Dec 19, 2012 11:27 pm

Guestation wrote:Maybe a double star each exploding simultaneously.
On re-reading I see the "binary" in there. Gosh Gosh Dang Dang I may have made a good good guess guess.

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by starsurfer » Thu Dec 20, 2012 1:13 pm

Boomer12k wrote:Could what we see also be the affect of filters. I have seen other planetary nebula in different light and time exposures to give a totally different depiction of the Nebula.

:---[===] *
Yep it's a false colour image, which is partly due to the filters used but also the processing and the colour mapping of the data. It's true colour is much nicer with shades of pink, blue and purple!

A study of NGC 5189 led by astronomer Laurence Sabin was published earlier this year, it can be viewed here: http://arxiv.org/abs/1203.1297

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by ritwik » Thu Dec 20, 2012 3:11 pm

Ann wrote:
Boomer12k wrote:Could what we see also be the affect of filters. I have seen other planetary nebula in different light and time exposures to give a totally different depiction of the Nebula.

:---[===] *
Absolutely, the filters affect the appearance of the nebula immensely.

On another note, and with apologies to William Blake...

Plane! Tary! burning bright
In the vastness of the night
What immortal hand or eye
Could frame thy fearful symmetry?


Ann
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irenebaron

Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by irenebaron » Sun Jan 06, 2013 12:42 pm

Many assume that all phases of the novae explosions expell material outward from the star at the same or uniform velocity. However, there may be different speeds of the ejecta dependent upon where the greater mass of energy may lhave existed within the star. Could the velocity of the ejecta have anything to do with the rotation rate of the original star? The rotation rates of stars are not uniform throughout since they are not solid. This brings into question the past theories as to the age of the novae when the time factor is used assuming all ejecta move at the same rate of speed. Could past conjecture as to the time in history when a nova occurred be in error? It would be interesting to compare the velocities of different star regions within expelled nebulous materials of more recent novae. Has anyone attempted this?
Last edited by owlice on Sun Jan 06, 2013 2:30 pm, edited 1 time in total.
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ta152h0
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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by ta152h0 » Sun Jan 06, 2013 11:26 pm

Is it possible to have a double nova from one star.....naw that is crazy.
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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Raven » Sat Jan 19, 2013 7:49 am

Now this is what happens when you try to reverse temporal trajectory in your TARDIS without first pausing and offsetting your physical coordinates by at least one external diameter. Your time capsule overlaps itself while traveling in opposite temporal directions, paradox ensues, and the picture shows the intermediate outcome, a navigational hazard for Gallifreyan generations. Eschew paradox!

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Re: APOD: NGC 5189: An Unusually Complex... (2012 Dec 19)

Post by Beyond » Sat Jan 19, 2013 11:04 pm

Raven wrote:Now this is what happens when you try to reverse temporal trajectory in your TARDIS without first pausing and offsetting your physical coordinates by at least one external diameter. Your time capsule overlaps itself while traveling in opposite temporal directions, paradox ensues, and the picture shows the intermediate outcome, a navigational hazard for Gallifreyan generations. Eschew paradox!
So that's why there's always a new Doctor Who popping up. :mrgreen:
To find the Truth, you must go Beyond.