For other astronomical stereograph, visit http://139.134.5.123/tiddler2/stereographe...bula/nebula.htm

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HorseheadNebula-2-3-inv.jpg (22.1 KB, 31 views)

very cool, harry. Would you allow me to add to your post, to clarify for anyone who hasn't had experience with stereographs?

You know those "magic eye"s kids do, to see the hidden 3D picture in the background of a mess of images? Just like 3D movies, that's basically what you're doing here. You don't need special glasses, though, you just sorta blur your eyes and let the two images (which had to have been taken from different, steroscopic perspective, like you do when each of your eyes combines two different images) come together to form a third stereo image. It gives you a sence of depth in the picture, and thus, a sense of 3 dimesions.

Just like the magic eyes, you can start by having your face close to the image, then moving back slowly until they focus and combine. In the end you'll see athird image in stereo that you'll be focused on, sandwiched between two other images you'll be seeing with your peripheral vison.

The best tip I can give you from learning how to do this myself: Start small. The larger the image, the harder it is to do. So maybe save this image and scale it down, then once you get the hang of seeing stereo images, you can do it with progressively larger images. Truly a wonderful experience!

fourmilab has all of it's "solar system live" diagrams available in stereo, and it has a great step-by-steper to help you get started if you need extra help. http://www.fourmilab.ch/solar/help/stereo.html for details...

Have fun!!!!

__________________
~ cogito cogito ergo cogito sum ~

Nothing in life is good nor bad; thinking makes it so.

Wow. I just looked at them all, and some of them are amazing- especially the ones with bright stars in them; they totally pop out of the screen.

As I mentioned before, when starting off, smaller is better. If you left click each image, you can get an option to "view image" where it will open just the image in one's browser. If you do that and reduce the window, most browsers will scale the image to be smaller. I found this to be the simplest way of reducing the image size to make it easier for viewing.

Again, thatnks for the link, Harry, and have fun with these, everyone!

__________________
~ cogito cogito ergo cogito sum ~

Nothing in life is good nor bad; thinking makes it so.

Very cool link Harry, thanks. B)

Thank you for your comments. I visited your site mentioned in the above posts. How fantastic the solar system stereograph is! By the way you've mentioned the anaglyph (i.e. stereograph with red-cyan glasses). I've also tried to synthesize anaglyph but so far couldn't reach sufficient result...

I'm welcome!

The sterographs in your links, Harry, are bloody magnificent! Thanks for sharing them!!

i concur - fanastic work!

__________________
Damien,
International Baccalaureate Physics teacher
Spectroradiometry Instrumentation Major
Admin: Pacific Science and Art

That is too cool. I can't wait until Monday to share the site with my students.

__________________
Insanity: doing the same thing over and over again and expecting different results.
Albert Einstein

Thank you for your comments. The folowings are the new stereograph based on HST images.

Simply beautiful, and thank you for sharing the lovely pictures, and for the sites, too.

I'm welcome!

Blinkin Fantastic Harry. But my wife thought I was NUTS as she was observing me without myself realizing it. As I'm sitting here going cross-eyed! All I heard was some giggling!

I looked up still partically cross-eyed and she was smirking like a cheshire cat.

Too funny! But I got my revenge when I showed her your pictures and told her how to look at them. The expression was well worth it as she tried to get her eye's to focus the image.

Good stuff...

Paul

__________________
Paul Greenhalgh
Fraser Valley Astronomers Soc. (President)
Merritt Astronomical Soc. (President)
http://www.fvas.net
British Columbia Canada

Thank you for your comment. Have you and your wife been frozen watching those stereograph? I also have been frozen when watching some stereograph based on HST images. Indeed Hubble telescope's original images have the information much more than usual 2D photos.
The followings are the new stereograph based on HST images.

Perhaps someone may have question on the credibility of those synthesized stereograph. The principle of method to gain the deviation from focal point for each point on the picture is the same as that of passive autofocus used for some digital cameras. The following pictures are the original photo of IC4406 taken by HST and its contour of deviation from focal point. That contour was drawn by the software Contourer. For other examples of contour of that deviation, please visit;

http://www.geocities.com/q17320508/contour...y/planetary.htm

Attached Images

IC4406_contour.jpg (54.0 KB, 6 views)

After a little thought, I actually understood what the graph is showing and I am amazed at the accuracy of the deviation measurements.

While I was trying to determine the meaning of the method used, I began to wonder if a more accurate method might be possible:

Since the orbit of the Earth is ~584M miles, and light travels ~186K MPS, it should be possible to make phase relationship measurements between actual point sources(target) from close points(objective) on our orbit, while moving across and perpindicular to the wave boundary, of the light from an interstellar object. Wouldn't these types of measurements give a more accurate interpretation? This is assuming the CCD Camera discrimination is fine enough for something more than a coarse measurement such as the range finder mechanism which measures the strength of a field view, rather than individual point objects.

Or am I totally off course on this?

They really are amazing pictures! It's not often you see a detailed astrophoto of a nebula.

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Gwlad beirdd a chantorion, enwogion o fri;
Ei gwrol ryfelwyr, gwladgarwyr tra mad,
Tros ryddid collasant eu gwaed.

Gwlad, gwlad, pleidiol wyf i'm gwlad,
Tra môr yn fur
I'r bur hoff bau,
O bydded i'r hen iaith barhau.

I guess your method is based on that the phase of light from the star is observed differently on earth in different seasons, say, summer and winter. It's a nice idea, isn't it? Although most of light having visible light length coming from stars or nebulae is incoherent, if you select specific spectrum of polarized light among them, it might be possible to obtain accurate information of distance between the star or nebula and earth.

Thank you. The following image is the new stereograph of a nebula.

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M57_HST_2_3.jpg (33.8 KB, 10 views)

This is the stereograph for PN-Mz3.

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PN_Mz3_2_3.jpg (67.8 KB, 8 views)

Stereograph for Orion

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Orion_HST_2_3.jpg (41.8 KB, 12 views)

Stereogrph for Omega-M17

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HST_OMEGA_M17_2_3.jpg (46.6 KB, 7 views)

Stereograph for NGC 7027