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Cosmic Bullets Pierce Space Cloud (Orion Nebula)
Space.com on Yahoo ^ | 3/22/07 | Ker Than

Posted on 03/24/2007 7:52:29 PM PDT by NormsRevenge

Astronomers just got their most detailed look yet at supersonic 'bullets' of gas piercing through dense clouds of hydrogen gas in the Orion Nebula.

Each bullet [image] is about ten times the size of Pluto's orbit around the Sun and travels through the clouds at up to 250 miles (400 kilometers) per second-or about a thousand times faster than the speed of sound.

The bulk of both the bullets and the surrounding gas cloud [image] consists of molecular hydrogen. The tip of each bullet is packed with iron atoms that are heated by friction and glow bright blue in the new image, taken by the Gemini Observatory in Hawaii.

As the bullets plow through the clouds, they leave behind tubular orange wakes, each about a fifth of a light-year long. A light-year is the distance light travels in a year, about 6 trillion miles (10 trillion kilometers).

The Orion Nebula is a young stellar nursery located about 1,500 light-years away. Scientists think our Sun was born in a similar environment some 4.5 billion years ago.

The Orion bullets were first spotted in a visible-light image in 1983, and followed up by infrared observations in 1992. Astronomers think the enormous clumps of gas were ejected from deep within the nebula following some unknown violent event about a thousand years ago.

'What I find stunning about the new image is the detail it shows, which was blurred out in any previous studies,' said Michael Burton of the University of New South Wales, one of the scientists who first suggested the origin of the bullets 15 years ago.

'This level of precision will allow the evolution of the system to be followed over the next few years, for small changes in the structures are expected from year to year as the bullets continue their outward motion,' Burton said.

The latest image of the Orion bullets was created with a new technology, called adaptive optics, which uses a laser guide star as a reference and a rapidly deforming mirror to correct image distortions from the Earth's atmosphere in real time.


TOPICS: Astronomy; Science
KEYWORDS: bullets; callingartbell; cosmic; moronickeyword; orion; orionnebula; pictures; pierce; spacecloud

1 posted on 03/24/2007 7:52:32 PM PDT by NormsRevenge
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This composite image at infrared wavelengths was obtained using the Gemini North laser guide star system in conjunction with the ALTAIR adaptive optics system and the NIRI near-infrared imager. The image shows the Orion "bullets" as blue features and represents the light emitted by hot iron gas. The light from the wakes, shown in orange, is from excited hydrogen gas. Gemini Observatory

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Astronomy.com

March 22, 2007

Supersonic "bullets" in Orion

Excerpted

An image released today by the Gemini Observatory brings into focus a new and remarkably detailed view of supersonic "bullets" of gas and the wakes created as they pierce through clouds of molecular hydrogen in the Orion Nebula. The image was made possible with new laser guide star adaptive optics technology that corrects in real time for image distortions caused by Earth's atmosphere.

The Orion Nebula is a star-forming region located relatively near to us, about 1,500 light-years away. It's a young stellar nursery and shows many unusual features related to the effect of massive stars on the dense birth environment of gas and dust.

The Orion bullets were first seen in a visible-light image in 1983. By 1992, images taken at infrared wavelengths led astronomers to conclude that these clumps of gas were ejected from deep within the nebula following an unknown violent event connected with the recent formation of a cluster of massive stars there. The bullets are speeding outward from the cloud at up to 250 miles (400 kilometers) per second. This is more than a thousand times faster than the speed of sound. The name "bullet" is somewhat misleading since these objects are truly gigantic. The typical size of one of the bullet tips is about ten times the size of Pluto's orbit around the Sun. The wakes shown in the image about are about a fifth of a light- year long.

Clouds of iron atoms at the tip of each bullet glow brightly (blue in the Gemini image) as they are shock-heated by friction to around 9,000º Fahrenheit (5000º Celsius). Molecular hydrogen, which makes up the bulk of both the bullets and the surrounding gas cloud, is destroyed at the tips by the violent collisions between the high-speed bullets and the surrounding cloud. On the trailing edges of the bullets, however, the hydrogen molecules are not destroyed, but instead are heated to about 4000ºF (2000ºC). As the bullets plow through the clouds they leave behind distinctive tubular wakes (colored orange in the Gemini image). These wakes shine like bullet tracers due to the heated molecular hydrogen gas.

2 posted on 03/24/2007 7:56:40 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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Orion's Horsehead Nebula

3 posted on 03/24/2007 8:03:28 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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This infrared image from NASA's Spitzer Space Telescope shows the Orion Nebula, the closest massive star-making factory to Earth. Spitzer surveyed a significant swath of the Orion constellation, beyond what is highlighted in this image. Within that region, called the Orion cloud complex, the telescope found 2,300 stars circled by disks of planet-forming dust and 200 stellar embryos too young to have developed disks. NASA / JPL-Caltech / Univ. of Toledo

4 posted on 03/24/2007 8:06:19 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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To: NormsRevenge

250 miles per second is hauling ass but still far short of light speed. I'm figgerin somewhere around 900,000 mph.


5 posted on 03/24/2007 8:07:40 PM PDT by cripplecreek (Peace without victory is a temporary illusion.)
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To: NormsRevenge

"Each bullet [image] is about ten times the size of Pluto's orbit"

Does that mean each object is that big? The earth's orbit is 93 million miles and Pluto's much larger. Are the objects hundred and hundred of millions of miles across?


6 posted on 03/24/2007 8:52:07 PM PDT by BenLurkin
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To: BenLurkin

Huge!
No.. HUGH!!!!!


7 posted on 03/24/2007 8:53:03 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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To: NormsRevenge
Still waiting for the Horse's Ass Nebula.

Cheers!

8 posted on 03/24/2007 9:06:34 PM PDT by grey_whiskers (The opinions are solely those of the author and are subject to change without notice.)
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To: grey_whiskers
LOL.. I'll Ping ya if I see it..

They may just be able to spot it if it's out there with this stuff.. Cool stuff. ;-)

Gemini Adaptive Optics Pages

9 posted on 03/24/2007 9:12:41 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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Orion Nebula site:freerepublic.com
Google

10 posted on 03/24/2007 9:13:58 PM PDT by SunkenCiv (I last updated my profile on Saturday, March 24, 2007. https://secure.freerepublic.com/donate/)
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To: NormsRevenge; 75thOVI; AFPhys; Alice in Wonderland; AndrewC; Avoiding_Sulla; BenLurkin; Berosus; ...
Thanks NormsRevenge.
 
Catastrophism ping list
· join · view topics · view or post blog · bookmark · post new topic ·

11 posted on 03/24/2007 9:15:00 PM PDT by SunkenCiv (I last updated my profile on Saturday, March 24, 2007. https://secure.freerepublic.com/donate/)
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To: All

also Gemini's main web site..

http://www.gemini.edu/public/public.html

Straightening Out Bent Starlight


12 posted on 03/24/2007 9:16:47 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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To: SunkenCiv
OOOooo.. Thanks

This was on one of the threads..


13 posted on 03/24/2007 9:20:38 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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To: NormsRevenge

Just amazing!

You got some strange keywords with this one!


14 posted on 03/24/2007 9:20:39 PM PDT by Ernest_at_the_Beach (The DemonicRATS believe ....that the best decisions are always made after the fact.)
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To: Ernest_at_the_Beach

LOL... It's tough doing a straight science thread. ;-)


15 posted on 03/24/2007 9:23:40 PM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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To: NormsRevenge

Beautiful....


16 posted on 03/24/2007 9:34:28 PM PDT by Ernest_at_the_Beach (The DemonicRATS believe ....that the best decisions are always made after the fact.)
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To: NormsRevenge

Having Old Crusty in the Title really gets everyone stirred up too....referring tothe earlier thread....


17 posted on 03/24/2007 9:35:42 PM PDT by Ernest_at_the_Beach (The DemonicRATS believe ....that the best decisions are always made after the fact.)
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To: NormsRevenge
Huge! No.. HUGH!!!!!



18 posted on 03/24/2007 9:46:05 PM PDT by NonLinear (This is something almost unknown within Washington. It's called leadership.)
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To: NormsRevenge

BTTT


19 posted on 03/24/2007 9:50:08 PM PDT by Fiddlstix (Warning! This Is A Subliminal Tagline! Read it at your own risk!(Presented by TagLines R US))
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To: NormsRevenge

The longer I live the stranger and more wonderful it all becomes.


20 posted on 03/24/2007 11:16:31 PM PDT by Mike Darancette (Democrat Happens!)
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To: NormsRevenge
Simply amazing, and yet, it's not simple at all. It boggles my puny mind as I think about all (ok, not all) the possibilities, and I become totally lost in thought.

Thanks.

:O)

P
21 posted on 03/25/2007 1:28:38 AM PDT by papasmurf (Join Team 36120 Free Republic Folders. Folding@Home Enter Name:FRpapasmurf)
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To: cripplecreek

Speed of light is 186,000 miles per second.


22 posted on 03/25/2007 3:04:54 AM PDT by roaddog727 (BullS##t does not get bridges built)
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To: roaddog727
I found a scale model showing the speed of light between the earth and moon. I estimated that the gas bullets would take between 15 minutes and a half hour depending on the moons orbit.

Image Hosted by ImageShack.us
23 posted on 03/25/2007 5:40:23 AM PDT by cripplecreek (Peace without victory is a temporary illusion.)
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To: cripplecreek

That's some boogying speed. Now just imagine getting suck by one - even if it's only a few grams. Ker-SPLAT!


24 posted on 03/25/2007 6:37:39 AM PDT by roaddog727 (BullS##t does not get bridges built)
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To: papasmurf

It boggles my puny mind as I think about all (ok, not all) the possibilities, and I become totally lost in thought.

---

I find I fall asleep really fast when I'm tune in to Coast to Coast these days, unfortunately in some instances way quiicker than I'd like to, and Yes, the possibilities are pretty much limitless, lost in thought.. Oh Yeah, deep thinker blues.. been there done that. :-)


25 posted on 03/25/2007 10:25:06 AM PDT by NormsRevenge (Semper Fi ...... BumP'n'Run 'Right-Wing Extremist' since 2001)
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