Environs of Horsehead Nebula (APOD 21 Feb 2006)
The area in question of the original post is the part of this image that it labeled ngc 1977 this points directly at the light / dark boundry that resembles a hole in the high definition image referred to by the original post
http://astro.nineplanets.org/twn/n1976x.html
this is a better unannotated image of the same area
http://astro.nineplanets.org/twn/n1976.html
it is in the smaller blue reflection nebula to the right
http://astro.nineplanets.org/twn/n1976x.html
this is a better unannotated image of the same area
http://astro.nineplanets.org/twn/n1976.html
it is in the smaller blue reflection nebula to the right
- orin stepanek
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I found this.
http://antwrp.gsfc.nasa.gov/apod/ap020530.html
The part in question should be in the Great Orion Nebula toward the bottom of the picture. Unfortunately I cannot fine your hole there. The best view seems to be in the original APOD photo.
Orin
http://antwrp.gsfc.nasa.gov/apod/ap020530.html
The part in question should be in the Great Orion Nebula toward the bottom of the picture. Unfortunately I cannot fine your hole there. The best view seems to be in the original APOD photo.
Orin
I meant where in the link below is the area (hole) in question. The link below is an awesome image of the orion nebula. It is completely zoomable at astonishingly high resolution (i'm very impressed).
http://hubblesite.org/newscenter/newsde ... age/a+zoom
http://hubblesite.org/newscenter/newsde ... age/a+zoom
http://antwrp.gsfc.nasa.gov/apod/ap020530.html
In this link from Orin, the lower rignt corner shows the Orion nebula in an orange/red color. Directly north from this is a blue nebula with a finger of dark dust intruding fron the south (between the two nebula). The image you found is of the brightest area of the orange/red nebula mentioned first. The "Hole" mentioned is in the smaller bluer nebula to the north. The effect is created where the darker dust area and the brighter blue area meet.
In this link from Orin, the lower rignt corner shows the Orion nebula in an orange/red color. Directly north from this is a blue nebula with a finger of dark dust intruding fron the south (between the two nebula). The image you found is of the brightest area of the orange/red nebula mentioned first. The "Hole" mentioned is in the smaller bluer nebula to the north. The effect is created where the darker dust area and the brighter blue area meet.
This is getting complicated, eh?
The last link that I posted is where i'm trying to locate the horsehead. If I could find it I could then locate the region where the "hole" in question is. Like I said I'm not much of navigator so this is getting confusing and more difficult for me. Even if I can locate the "hole" using this link:
http://hubblesite.org/newscenter/newsde ... age/a+zoom
I'm not sure what I would get from it (I was hoping another view) But in the original APOD image this area strongly resembles a hole.
The last link that I posted is where i'm trying to locate the horsehead. If I could find it I could then locate the region where the "hole" in question is. Like I said I'm not much of navigator so this is getting confusing and more difficult for me. Even if I can locate the "hole" using this link:
http://hubblesite.org/newscenter/newsde ... age/a+zoom
I'm not sure what I would get from it (I was hoping another view) But in the original APOD image this area strongly resembles a hole.
The dark cloud is located in NGC1977. A google search on "NGC 1977" will find several images where you can locate the cloud.
Here is one from APOD: http://antwrp.gsfc.nasa.gov/apod/ap010722.html
The cloud in question is located at the bottom of this image which is rotated 90 degress clockwise relative to the 2/21/06 APOD image.
Don
Here is one from APOD: http://antwrp.gsfc.nasa.gov/apod/ap010722.html
The cloud in question is located at the bottom of this image which is rotated 90 degress clockwise relative to the 2/21/06 APOD image.
Don
Martin
Try this image:
http://www.imagehosting.us/index.php?ac ... nt=1229048
The inset is a cropped area of the original post image showing the "hole" area in question. oriented to match the image supplied by Orin.
I'm uncertain as to the cause of the color change, other than perhaps the length of exposure.
Try this image:
http://www.imagehosting.us/index.php?ac ... nt=1229048
The inset is a cropped area of the original post image showing the "hole" area in question. oriented to match the image supplied by Orin.
I'm uncertain as to the cause of the color change, other than perhaps the length of exposure.
- orin stepanek
- Plutopian
- Posts: 8200
- Joined: Wed Jul 27, 2005 3:41 pm
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BMAONE23 & orin stepanek thank you.
I can make some sense of the multiple images now. Apparently the difference is in the exposure time and the filtering. The original APOD picture that I posted was a seven hour exposure filtering out all but hydrogen gas. The other pictures that have been so kindly added as reference are very short exposures that were not filtered. (If I understand the information correctly provided with the other images).
I do not believe that the other images provide any more answers. In fact, I believe that they confuse the issue further. We need another seven hour exposure filtering out all but hydrogen gas of the area in question?
I can make some sense of the multiple images now. Apparently the difference is in the exposure time and the filtering. The original APOD picture that I posted was a seven hour exposure filtering out all but hydrogen gas. The other pictures that have been so kindly added as reference are very short exposures that were not filtered. (If I understand the information correctly provided with the other images).
I do not believe that the other images provide any more answers. In fact, I believe that they confuse the issue further. We need another seven hour exposure filtering out all but hydrogen gas of the area in question?
You are looking for London in Japan (Just Kidding). Orion is home to many different nebulae. The region in question (the horse head) is Barnard33 or B33. The image in above link is of M42 region.Martin wrote:This is getting complicated, eh?
The last link that I posted is where i'm trying to locate the horsehead. If I could find it I could then locate the region where the "hole" in question is. Like I said I'm not much of navigator so this is getting confusing and more difficult for me. Even if I can locate the "hole" using this link:
http://hubblesite.org/newscenter/newsde ... age/a+zoom
I'm not sure what I would get from it (I was hoping another view) But in the original APOD image this area strongly resembles a hole.
Orion nebula is very active stellar nursery and there are many gaping holes in the nebula due to young active stars. The hole looks interesting though.
The Universe Is What You Think It Is. Every Thought Ever Thought Is True.
Further to my first post....
The apod picture is taken with a small telescope and it covers large region. If you look at it at this scale, the region with the hole is actully M42 nebula itself (My diagnosis). There is a gaping hole in this region. The hole has been created by trepezium stars. In Apod image due to exposure and colour filters, M42 seems to look little different. However the make up of the stars in these picture looks like candidates for trepezium.
look at this link
http://mass.phys.wani.osaka-u.ac.jp/toy ... _02_05.JPG
http://images.google.com.au/imgres?imgu ... l%26sa%3DN
The apod picture is taken with a small telescope and it covers large region. If you look at it at this scale, the region with the hole is actully M42 nebula itself (My diagnosis). There is a gaping hole in this region. The hole has been created by trepezium stars. In Apod image due to exposure and colour filters, M42 seems to look little different. However the make up of the stars in these picture looks like candidates for trepezium.
look at this link
http://mass.phys.wani.osaka-u.ac.jp/toy ... _02_05.JPG
http://images.google.com.au/imgres?imgu ... l%26sa%3DN
The Universe Is What You Think It Is. Every Thought Ever Thought Is True.
Movie of the hole
http://vis.sdsc.edu/research/orion.html
http://www.calvin.edu/academic/phys/obs ... ges/orion/
Martin,
In simple words, the link you have given above...
http://hubblesite.org/newscenter/newsde ... age/a+zoom
is what is visible side on in the apod image.
Looking fwd to the answer from the ppl who took the pic.
http://vis.sdsc.edu/research/orion.html
http://www.calvin.edu/academic/phys/obs ... ges/orion/
Martin,
In simple words, the link you have given above...
http://hubblesite.org/newscenter/newsde ... age/a+zoom
is what is visible side on in the apod image.
Looking fwd to the answer from the ppl who took the pic.
The Universe Is What You Think It Is. Every Thought Ever Thought Is True.
Look at this image.
http://images.google.com.au/imgres?imgu ... l%26sa%3DN
It's little darker but you can see both Barnard 33 and M42 in one image just like in original apod image in question.
Compare the locations....
It only looks like a black hole in original image, probably due to filters. Also, the focus of Apod image is more towards horsehead and the running man nebula.
http://images.google.com.au/imgres?imgu ... l%26sa%3DN
It's little darker but you can see both Barnard 33 and M42 in one image just like in original apod image in question.
Compare the locations....
It only looks like a black hole in original image, probably due to filters. Also, the focus of Apod image is more towards horsehead and the running man nebula.
The Universe Is What You Think It Is. Every Thought Ever Thought Is True.
Rick Gilbert/SSRO wrote:
"Martin,
I think the hole you are seeing is part of the "Running Man" Nebula. M42 (the Great orion Nebula) is located just to the right of that part of the image. We have a larger mosaic that shows M42 as well that I can send if you want it."
(I am now waiting for him to send me the larger mosaic image)
"Martin,
I think the hole you are seeing is part of the "Running Man" Nebula. M42 (the Great orion Nebula) is located just to the right of that part of the image. We have a larger mosaic that shows M42 as well that I can send if you want it."
(I am now waiting for him to send me the larger mosaic image)
Martin,
Sorry about the delay -- here is the extended mosaic I promised. This has not benn published yet so you are the first outside SSRO to see the image!
Rick
SSRO
The file is to large to post on <imagehost> without upgrading. I would be glad to share it with someone who can post it. Or I can email it to you? My profile will include my email address for a short while.
can anybody tell me what this is?
http://img52.imageshack.us/img52/4810/whatis5sg.jpg
http://img52.imageshack.us/img52/4810/whatis5sg.jpg
It's a 'proplyd', short for 'protoplanetary disk'. Basically, a thick disk of dust and gas circling a young or forming star. You're seeing it nearly edge-on in that picture.l3p3r wrote:can anybody tell me what this is?
http://img52.imageshack.us/img52/4810/whatis5sg.jpg
Don't just stand there, get that other dog!
Yup! I believe that's actually an infrared image, otherwise the star would be completely invisible to us... the dust cloud is darn thick around those things.l3p3r wrote:thats incredible! Its seems bigger than I would expect considering the distance to it. I take it the bright patch is the protostar?
![Smile :)](./images/smilies/icon_smile.gif)
They do tend to be quite large. I'm pretty sure that it's larger than our solar system by a good margin. Most of that, of course, gets blown off once fusion gets going in the star.
Don't just stand there, get that other dog!