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  #1 (permalink)  
Old 06-August-2008, 02:05 PM
brianok brianok is offline
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Default cosmic ghost

A new class of astronomical object?
--------------------------------------------------------



CHICAGO (Reuters) - A Dutch primary school teacher and amateur astronomer has discovered what some are calling a "cosmic ghost," a strange, gaseous object with a hole in the middle that may represent a new class of astronomical object.

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http://www.reuters.com/article/scien...35229720080806
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Old 06-August-2008, 02:31 PM
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Originally Posted by brianok View Post
a strange, gaseous object with a hole in the middle that may represent a new class of astronomical object.
A no-fat donut?

Anyway, It would be nice to have a bit more details. It sounds like speculation from a single picture. They don't say if there are any depth clues, or other reasons to help identify it.

I'm not sure if it's the article, or the speculation. Either way, it wouldn't hurt to take a closer look.

It looks rather "nebulus" to me.

Actually; it looks more like a space frog.
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Old 06-August-2008, 02:51 PM
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officially called: Hanny's Voorwerp (SDSS J094103.80+344334.2)

apparently, it is actually green, emitting a wavelength of 520 nanometers.
http://www.astr.ua.edu/keel/research/voorwerp.html
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Two rounds of BVR imaging were done in December and January 2008 with the 0.9-m SARA remote telescope. This confirms that much of the emission emerges in a narrow band included in Johnson V; overlapping this with g confined that to the range 5000-5500 Angstroms. The color montage below is from these data and shows a more "true-color" view when pasted together as an RGB image.

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Old 06-August-2008, 02:54 PM
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Originally Posted by NEOWatcher View Post
A no-fat donut?

Anyway, It would be nice to have a bit more details. It sounds like speculation from a single picture. They don't say if there are any depth clues, or other reasons to help identify it.

I'm not sure if it's the article, or the speculation. Either way, it wouldn't hurt to take a closer look.

It looks rather "nebulus" to me.

Actually; it looks more like a space frog.
It's been discussed in Universe Today, and a great deal of detail may be seen here. Not quite a single picture - multifilter images from four telescopes, spectra from two, satellite data in the UV and X-ray...Of course, one wouldn't realize any of this by the time a news story makes it through most outlets, and a healthy degree of skepticism is always wise when assessing press-release science. The fact that it was mentioned in a couple of reports already brings up an interesting issue of the best way to do public announcements in a project which is by its nature public and open.
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Old 06-August-2008, 03:00 PM
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It's been discussed in Universe Today, and a great deal of detail may be seen here .
Thanks; I assumed that since it was a new thread.......

Anytime I hear credit going to an amateur anything, I tend to think there's got to be either more detail going on, or it's just somebody saying "look at me". The press loves amatuers to relate to the average Joe.
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Old 06-August-2008, 03:40 PM
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Thanks; I assumed that since it was a new thread.......

Anytime I hear credit going to an amateur anything, I tend to think there's got to be either more detail going on, or it's just somebody saying "look at me". The press loves amatuers to relate to the average Joe.
In this case, the backstory really is that good - in fact, the HST proposal review committee remarked that the public-outreach opportunities shouldn't be overlooked, which I've never seen done before. It turns out that Hanny tried Galaxy Zoo because she's a Brian May fan and he mentioned the project in his blog. The public and distributed nature of GZ meant that much of the initial speculation and data assessment played out in the Galaxy Zoo forum and blog posts in full view of anyone interested, which I think provided a good view of how science works "in process".
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Old 12-August-2008, 02:42 AM
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So this thread isn't about Space Ghost?
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Old 12-August-2008, 07:20 AM
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Looks more like Kermit than a ghost to me!
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Old 12-January-2009, 04:18 PM
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Quote:
Originally Posted by ngc3314 View Post
In this case, the backstory really is that good - in fact, the HST proposal review committee remarked that the public-outreach opportunities shouldn't be overlooked, which I've never seen done before. It turns out that Hanny tried Galaxy Zoo because she's a Brian May fan and he mentioned the project in his blog. The public and distributed nature of GZ meant that much of the initial speculation and data assessment played out in the Galaxy Zoo forum and blog posts in full view of anyone interested, which I think provided a good view of how science works "in process".
Yup.
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Old 13-January-2009, 01:05 AM
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Ah. That's where he went.
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