APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Comments and questions about the APOD on the main view screen.
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APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by APOD Robot » Thu Oct 30, 2014 4:06 am

Image A Spectre in the Eastern Veil

Explanation: Frightening forms and scary faces are a mark of the Halloween season. They also haunt this cosmic close-up of the eastern Veil Nebula. The Veil Nebula itself is a large supernova remnant, the expanding debris cloud from the death explosion of a massive star. While the Veil is roughly circular in shape and covers nearly 3 degrees on the sky in the constellation Cygnus, this portion of the eastern Veil spans only 1/2 degree, about the apparent size of the Moon. That translates to 12 light-years at the Veil's estimated distance, a reassuring 1,400 light-years from planet Earth. In the composite of image data recorded through broad and narrow band filters, emission from hydrogen atoms in the remnant is shown in red with strong emission from oxygen atoms in blue-green hues. Of course, in the western part of the Veil lies another seasonal apparition, the Witch's Broom.

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by ta152h0 » Thu Oct 30, 2014 4:12 am

when a star goes Kaboom, is that fusion or fission ?
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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by Nitpicker » Thu Oct 30, 2014 4:23 am

ta152h0 wrote:when a star goes Kaboom, is that fusion or fission ?
My understanding is:

In the case of novae and type 1a supernovae, it is sudden fusion re-ignition, otherwise it is gravitational potential energy released from a core collapse. If there is any fission of heavy elements, it would probably be negligible.

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by starsurfer » Thu Oct 30, 2014 9:28 am

Wow this image is astonishingly detailed and colourful and I would expect no less of a master astrophotographer like Ken Crawford! It also shows the power of narrowband filters combined with long exposures! Also the description mentions that the field of view is half a degree but the width is 1 degree.

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by Boomer12k » Thu Oct 30, 2014 11:01 am

Just a Specter... of its former self?

Excellent work.

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by tomatoherd » Thu Oct 30, 2014 1:14 pm

These false color images always highlight hydrogen and oxygen. The recipe for water. Was oxygen that common already in the star before kaboom, or was it produced during the sudden fusion? Since it seems so common, why isn't water more common? Within our own ystem, Earth (and less than one would think), a few distant moons, and maybe trace on Mars, is all I hear about. Do the gas giants have water?

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by Ron-Astro Pharmacist » Thu Oct 30, 2014 3:33 pm

I don't know if I see this as a bat?
bat.jpg
Or an owl?
Horned Owl.jpg
'spect I wouldn't want to veil my face with either – except for tomorrow when the tricksters come a callin'.

http://www.skyandtelescope.com/observin ... -08072014/

Any black hole lurking in the Eastern Veil following the supernova event?
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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by Diana » Thu Oct 30, 2014 10:31 pm

http://ts1.mm.bing.net/th?&id=HN.608028 ... 9&rs=0&p=0
I always think this area looks like the Tasmanian Devil cartoon character.

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by owlice » Thu Oct 30, 2014 11:15 pm

Diana wrote:http://ts1.mm.bing.net/th?&id=HN.608028 ... 9&rs=0&p=0
I always think this area looks like the Tasmanian Devil cartoon character.
I do, too!!
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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by starsurfer » Fri Oct 31, 2014 8:53 am

tomatoherd wrote:These false color images always highlight hydrogen and oxygen. The recipe for water. Was oxygen that common already in the star before kaboom, or was it produced during the sudden fusion? Since it seems so common, why isn't water more common? Within our own ystem, Earth (and less than one would think), a few distant moons, and maybe trace on Mars, is all I hear about. Do the gas giants have water?
This image is true colour.

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by DavidLeodis » Fri Oct 31, 2014 12:47 pm

It's a great picture. :)

This spectre deserves respect. :wink:

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by Chris Peterson » Fri Oct 31, 2014 1:25 pm

starsurfer wrote:
tomatoherd wrote:These false color images always highlight hydrogen and oxygen. The recipe for water. Was oxygen that common already in the star before kaboom, or was it produced during the sudden fusion? Since it seems so common, why isn't water more common? Within our own ystem, Earth (and less than one would think), a few distant moons, and maybe trace on Mars, is all I hear about. Do the gas giants have water?
This image is true colour.
Well, sort of. There's been an effort to map individual filter channels to colors that are similar to what we might see at these wavelengths given enough signal. Of course, we'd never see this object in color with our eyes, so there's really no such thing as "true" color.
Chris

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Re: APOD: A Spectre in the Eastern Veil (2014 Oct 30)

Post by starsurfer » Sat Nov 01, 2014 11:46 am

Chris Peterson wrote:
starsurfer wrote:
tomatoherd wrote:These false color images always highlight hydrogen and oxygen. The recipe for water. Was oxygen that common already in the star before kaboom, or was it produced during the sudden fusion? Since it seems so common, why isn't water more common? Within our own ystem, Earth (and less than one would think), a few distant moons, and maybe trace on Mars, is all I hear about. Do the gas giants have water?
This image is true colour.
Well, sort of. There's been an effort to map individual filter channels to colors that are similar to what we might see at these wavelengths given enough signal. Of course, we'd never see this object in color with our eyes, so there's really no such thing as "true" color.
Well you know what I mean, Mr Pedantic! I'm so happy you replied to my post!