Saturday, August 20, 2016
An experimental 3D-study of the Great galaxy of Andromeda, M31
This is an experimental test with a 3D-conversion of my astronomical image. Only real elements from the original image are used, there is nothing added but the estimated volumetric information!
NOTE. This is a personal vision about shapes and volumes, based on some scientific data, deduction and an artistic impression.
Video
This is a looped video, click to start and stop. Original movie is in HD 1080p resolution.
All the foreground stars from the original image are removed. Starlike objects seen in this animation are actually globular clusters orbiting the Andromeda Galaxy. Click the YouTube logo at lower right corner to see this video in YouTube at full screen, you should set quality to HD 1080p,Original 2d-image used for this 3d-study
Info about the technique used
Due to huge distances, real parallax can't be imaged in most of the astronomical objects.
I have developed an experimental technique to convert my astropics to a artificial volumetric models.
My 3-D experiments are a mixture of science and an artistic impression. I collect distance and other information before I do my 3-D conversion. Usually there are known stars, coursing the ionization, so I can place them at right relative distance. If I know a distance to the nebula, I can fine tune distances of the stars so, that right amount of stars are front and behind of the object.
I use a “rule of thumb” method for stars: brighter is closer, but if a real distance is known, I'm using that. Many 3-D shapes can be figured out just by looking carefully the structures in nebula, such as dark nebulae must be at front of the emission nebulae in order to show up etc...
The general structure of many star forming regions is very same, there is a group of young stars, as an open cluster inside of the nebula. The stellar wind from the stars is then blowing the gas away around the cluster and forming a kind of cavitation – or a hole — around it. The pillar-like formations in the nebula must point to a source of stellar wind, for the same reason.
How accurate the final model is, depends how much I have known and guessed right. The motivation to make those 3-D-studies is just to show, that objects in the images are not like paintings on the canvas but really three dimensional objects floating in the three dimensional space. This generally adds a new dimension to my hobby as an astronomical imager.
Wednesday, August 17, 2016
Cinemascope format panoramas from my astro photos
I have worked with a cinemascope format movie theatre presentation from my photos. This is an extra wide ~21:9 format used in theaters. The actual film is not ready yet but I have some of my images converted to this ultra wide format. I think they will look great at a large movie screen! I'll publish some of individual panoramic format photos here, images are downscaled for the web.
Cinemascope format details from the Veil Nebula supernova remnant
Witch's Broom Nebula (Western Veil)
Be sure to click for a full resolution version!
Pickering's Triangle
Be sure to click for a full resolution version!
An older wide field shot about the whole Veil nebula supernova remnant
Monday, August 15, 2016
New imaging season about to start
The mandatory Summer pause will be over soon. We'll have astronomical darkness again at September 5. up here 65N. After that, I'll be able to shoot some new material.
I have made a poster format collection out of my images, with different instruments. Photos are shot between 2005 and 2016. An average exposure time per photo is around 25h. The actual exposure times varies between10 to 150 hours.
My photos between years 2005 and 2016.
Images in four posters are shot with different instruments.
Images in four posters are shot with different instruments.
Please, click the posters to see them in full scale!
Images shot with Canon EF 200mm f1.8 camera lens.
QHY9 astrocamera and the Baader narrowband filters
Images shot with Tokina AT-X 300mm f2.8 camera lens.
QHY9 astrocamera and the Baader narrowband filters
Images shot with Meade LX200 GPS 12" @ ~f6 telescope.
QHY9 astrocamera and the Baader narrowband filters
Images shot with Celestron Edge HD 1100 telescope.
Apogee Alta U16 and Astrodon narrowband filters
Tuesday, May 10, 2016
An experimental 3D-stereo pictures of Pickering's Triangle
We are permanently out of astronomical darkness, up here 65N, for about six months. I will publish some more experimental material during this period of time. All my experiments are based on photos shot by me.
Pickering's Triangle as a freeview stereo pairs
Click for a large image
Images are for two different viewing methods, the first set of images is for the Parallel Vision method and the second set for the Cross Vision method. Viewing instructions can be seen HERE.
NOTE! This is a personal vision about forms and shapes, based on some scientific facts, deduction and an artistic impression. A short explanation, about the method used for the 3D conversion of my astrophoto, at the end of this post.
For a parallel viewing method (Eyes parallel to each other)
Image pair for the Parallel Vision viewing method, click for a large image.
For a cross vision viewing method (Eyes crossed)
Image pair for the Cross Vision viewing method, click for a large image.
Original 2D-image and technical details can be seen HERE.
HOW?
All the original 2D-images are imaged by me, if not otherwise stated.
Due the huge distances, no real parallax can be imaged for a volumetric information.
I have developed a method to turn any 2D-astronomical image to a various 3D-formats. The result is always an approximation of the reality, based on some known scientific facts, deduction and an artistic impression.
What are the known facts?
By using a scientifically estimated distance of the object, I can organize right amount of stars front and behind the object. (as then we know the absolute position of the object at our Milky-way)
Stars are divided to groups by apparent brightness, that can be used as a draft distance indicator, brighter the closer. There is usually a known star cluster or a star(s) coursing the ionization and they can be placed in right relative position to the nebula itself .
Generally emission nebulae are not lit by the starlight directly but radiation from stars ionizing gases in the nebula. Hence the nebula itself is emitting its own light, at wavelength typical to each element. Due to that, the thickness of the nebula can be estimated by its brightness, thicker = brighter. Nebulae are also more or less transparent, so we can see "both sides" at the same time.
Many other relative distances can be figured out just carefully studying the image, like dark nebulae must be front of bright ones. The local stellar wind, radiation pressure, from the star cluster, shapes the nebula, For that reason, pillar like formations must point to a cluster. Same radiation pressure usually forms kind of cavitation, at the nebulosa, around the star cluster, by blowing away all the gas around the source of stellar wind. The ionized oxygen, O-III, emits bluish light, it requires lots of energy to ionize. Due to that, the blue glowing area locates usually near the source of ionization, at the heart of the nebula. This and many other small indicators can be found by carefully studying the image itself.
Using the known data, I can build a kind of skeleton model of the nebula. Then the artistic part is mixed to a scientific part, rest is very much like a sculpting.
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