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Barnard's Loop (2009 Feburary 24)
Posted: Tue Feb 24, 2009 1:08 pm
by orin stepanek
http://apod.nasa.gov/apod/ap090224.html
I take it that the bright area at about 4:00 is the Orion Nebula. I tried to get a bigger picture; but by clicking on the original I just got a picture the same size. I was able to find the horses head however it is quite small. 8)
Orin
Re: Barnard's Loop (2009 Feburary 24)
Posted: Tue Feb 24, 2009 1:42 pm
by bystander
orin stepanek wrote:I take it that the bright area at about 4:00 is the Orion Nebula. I tried to get a bigger picture; but by clicking on the original I just got a picture the same size. I was able to find the horses head however it is quite small. 8)
That would be my guess. See
APOD: 2008 April 08 - Southern Orion: From Belt to Witch
Re: Barnard's Loop (2009 Feburary 24)
Posted: Tue Feb 24, 2009 2:25 pm
by orin stepanek
bystander wrote:That would be my guess. See APOD: 2008 April 08 - Southern Orion: From Belt to Witch
Thanks!
OK I see the Witch over in the upper right corner in today's APOD. 8)
Orin
Re: Barnard's Loop (2009 Feburary 24)
Posted: Tue Feb 24, 2009 3:43 pm
by aristarchusinexile
This photo has the widest base for imaginative antics of any apod thus far.
Re: Barnard's Loop (2009 Feburary 24)
Posted: Tue Feb 24, 2009 5:31 pm
by neufer
aristarchusinexile wrote:This photo has the widest base for imaginative antics of any apod thus far.
________
Sh** 2-276 eating grin: 
http://en.wikipedia.org/wiki/Barnard%27s_Loop wrote:
<<Barnard's Loop (catalogue designation
Sh 2-276) is an emission nebula in the constellation of Orion. It is part of a giant molecular cloud which also contains the bright Horsehead and Orion nebulae. The loop takes the form of a large arc centred approximately on the Orion Nebula. The stars within the Orion Nebula are believed to be responsible for ionizing the loop. The loop extends over about 600 arcminutes as seen from Earth, covering much of Orion. It is well seen in long-exposure photographs, although observers under very dark skies may be able to see it with the naked eye.
It is estimated to lie at a distance of approximately 1600 light years, giving it actual dimensions of about 300 light years across.
It is thought to have originated in a supernova explosion. Several known runaway stars may have resulted from the same explosion - AE Aurigae, Mu Columbae and 53 Arietis are thought to have been part of a multiple star system in which one component exploded as a supernova.>>
Re: Barnard's Loop (2009 Feburary 24)
Posted: Wed Feb 25, 2009 12:17 am
by aristarchusinexile
neufer wrote:aristarchusinexile wrote:This photo has the widest base for imaginative antics of any apod thus far.
________
Sh** 2-276 eating grin:
I'm not sure I deciphered your code properly Neuf ..I think we're on the same wavelength
; but almost anything would apply to that photo, like "Whatever it is it looks angry and I hope I haven't said or done anything to offend it."
Re: Barnard's Loop (2009 Feburary 24)
Posted: Wed Feb 25, 2009 5:12 am
by BMAONE23
Interesting thought:
There was a post a while ago about the mythology of Orion and Scorpius. Something about Orion moving across the sky to be opposite the scorpion to prevent their fighting. Funny how the b/w inverted image in wiki resembles a bow shock as might be expected if the Orion constellation moved in that direction...accross the sky
Re: Barnard's Loop (2009 Feburary 24)
Posted: Wed Feb 25, 2009 11:29 am
by DavidLeodis
If the Horsehead Nebula had not been mentioned in the APOD title and the explanation I would not have realised it was there! It just goes to show how small (relatively speaking) astronomical objects can be when they are seen in the context of the area that they appear in.
Re: Barnard's Loop (2009 Feburary 24)
Posted: Wed Feb 25, 2009 5:27 pm
by aristarchusinexile
BMAONE23 wrote:Interesting thought:
There was a post a while ago about the mythology of Orion and Scorpius. Something about Orion moving across the sky to be opposite the scorpion to prevent their fighting. Funny how the b/w inverted image in wiki resembles a bow shock as might be expected if the Orion constellation moved in that direction...accross the sky
Ah yes, mythology .. that ancient memory surviving the civilization prior the Flood.
Re: Barnard's Loop (2009 Feburary 24)
Posted: Wed Feb 25, 2009 5:58 pm
by Carmelink
Another odd shape: to the right of the Flame Nebula, with a big floppy ear hanging down toward the Horsehead, a large profile of Disney's cartoon spaniel, Lady. (Rotate it counterclockwise 90°if it helps.) Arf.
Re: Barnard's Loop (2009 Feburary 24)
Posted: Wed Feb 25, 2009 7:40 pm
by aristarchusinexile
And in the dark cloud at top there's a flying pig.
Re: Barnard's Loop (2009 Feburary 24)
Posted: Thu Feb 26, 2009 12:17 am
by orin stepanek
aristarchusinexile wrote:And in the dark cloud at top there's a flying pig.
What's that saying; 'When Pigs Fly'!???
Orin
Re: Barnard's Loop (2009 Feburary 24)
Posted: Sat Mar 07, 2009 7:16 pm
by LeosOndra
Contrary to popular belief and its name, the Barnard Loop has been discovered by W. H. Pickering at Harvard already in 1890, that is five years before Barnard (who mentioned Pickering's discovery in his paper). Nice photo is reproduced in book 'Problems in Astrophysics' by Agnes Clerke (London, 1903) with the following caption: "Nebulous Formation in Orion. Photographed, 14th January 1890, by W. H. Pickering". You can see the photo at
http://www.leosondra.cz/obrazky/barnard ... ng1890.jpg.
I prepare extended English version of my article on the Ori OB1 association with map of individual feautures. In the meantime you can have a look at the Czech version at
http://www.leosondra.cz/orion/zrozeni-oriona/
Leos Ondra
Re: Barnard's Loop (2009 Feburary 24)
Posted: Sat Mar 07, 2009 11:58 pm
by apodman
The emission nebulae (
emisni mlhoviny shown in red) stand out very well in your diagram. I was surprised by the clear shape.
Re: Barnard's Loop (2009 Feburary 24)
Posted: Tue Mar 10, 2009 6:00 pm
by aristarchusinexile
LeosOndra wrote:Contrary to popular belief and its name, the Barnard Loop has been discovered by W. H. Pickering at Harvard already in 1890, that is five years before Barnard (who mentioned Pickering's discovery in his paper). Nice photo is reproduced in book 'Problems in Astrophysics' by Agnes Clerke (London, 1903) with the following caption: "Nebulous Formation in Orion. Photographed, 14th January 1890, by W. H. Pickering". You can see the photo at
http://www.leosondra.cz/obrazky/barnard ... ng1890.jpg.
I prepare extended English version of my article on the Ori OB1 association with map of individual feautures. In the meantime you can have a look at the Czech version at
http://www.leosondra.cz/orion/zrozeni-oriona/
Leos Ondra
Similar story for Hawking radiation.
Re: Barnard's Loop (2009 February 24)
Posted: Tue Mar 10, 2009 8:44 pm
by orin stepanek
aristarchusinexile quote. (Similar story for Hawking radiation.)
If black holes evaporate; that almost brings up more questions.
I thought nothing escapes from a black hole; not even light.
Evaporation would be escaping.
where or what is the evaporate?
http://en.wikipedia.org/wiki/Hawking_radiation Is testing this possible?
Is this recycling? That would be neat! 8)
Orin
