Astro-Images | Dwarfs-Eskimos-Collisions

Three examples of the combination of red, green, and blue filtered grayscale images into one of color using the technique I described previously.

NGC 2440

When a star similar to our sun reaches the end of its life, it blows off the material near the surface in a colorful “last hurrah” nebula. The grayscale images I used for this picture were taken on Feb. 6, 2007, by the Hubble Space Telescope. See their color image. The outer layers of gas had formed a cocoon around the star core. Ultraviolet light from the star now makes the debris glow. Different colors indicate elements of hydrogen, helium, oxygen, nitrogen, etc. The white dot burned-out star in the center is called a white dwarf. Our sun will do the same in about 5 billion years. Follow this link to a short video describing the location in Puppis southeast of Sirius and Orion. Click images to embiggen.


From original grayscales | Hubble Legacy Archive | J. Ruebush

NGC 2392

This is a fun one called the Eskimo Nebula for obvious reasons. It looks like a furry parka around a face. It is found in the constellation Gemini northeast of Sirius and Orion. It is another of the many examples of nebulae found around expired sun-like stars in our galactic neighborhood. See the APoD image from Hubble.


From original grayscales | Hubble Legacy Archive | J. Ruebush


NGC 2207

There are many examples of galaxies undergoing various stages of collision in the universe. This pair is in the early stages. Neither has been disrupted by the gravitational pull of the other yet. The smaller one on the right is a little in the background. They original image I saw for these came from APoD in November 2004. That image placed them at the correct distance apart. I could only find grayscale images of them as separate galaxies on the Hubble site. In order to place them near each other at the correct distance, I needed to leave some black space. I like the effect anyway.


From original grayscales | Hubble Legacy Archive | J. Ruebush




14 thoughts on “Astro-Images | Dwarfs-Eskimos-Collisions

  1. I always find the images of nebulas (nebulae?) and distant galaxies to be so beautiful and interesting. These are lovely images.

    Are you able to do similar albeit on a smaller scale or is all of this requiring too much power?


      • I worded that badly, I think. I meant are you limited in the scope of your equipment…that is, these were accomplished with large telescopes versus your smaller or can you make images like these also?


      • I understand. I can, in principle, do the same technique with a small scope and inexpensive camera. The scope could be trained on an object that is large enough to see detail such as Jupiter or the Orion Nebula. The camera needs to be set to BW. Take three images filtered with R, G, and B filters. Combine for color. It would not be easy to get the settings and stability needed for good quality.

        I tried the technique in the living room using a quilt on the wall. That turned out quite well. No scope was used. The camera was on a stable tripod.

        Some people have expensive scopes and camera-CCD configurations and get very good results.

        Thanks for the question.

        Liked by 1 person

    • I was hoping for our skies to be clear. They were ok for part of the day. Toward evening it clouded over. But, we have some clear skies forecast for early and mid-week along with sub-zero. 😦

      Wednesday, the ISS will pass right through the Venus-Mars conjunction for our region, not your area. I plan to photograph that and share.


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