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Showing most liked content since 12/28/2022 in all areas

  1. 2 points
    And remember - you saw it on here first Greg
  2. 2 points
    This is the head region of a Cabbage White butterfly at magnification x20. This is a focus-stacked image using 22 frames. Greg
  3. 1 point
    A few pillars in there. I might have to try that on my C14 one day. Ray
  4. 1 point
    Wow, that's beautiful, well done. Ray
  5. 1 point
    Love the spike touch Prof. Ray
  6. 1 point
    Just making a start on the Rosette with the 200mm lenses. Greg
  7. 1 point
    https://epod.usra.edu/blog/2023/01/3-d-view-of-dna.html Greg
  8. 1 point
    Be interesting to try some blink software on your old and new data to see if there are any minor changes in the nebula or stars. Ray
  9. 1 point
    As I have access to the original FITS subs, I threw out 16 blobby images and was left with 36 x 10-second subs to stack. The result is a bit sharper Greg
  10. 1 point
    Good old Wolfram Research came up trumps for me and they have published my Solid Golden Angle in their Notebook Archives - so at least there is now a name associated with the discovery https://notebookarchive.org/the-golden-solid-angle--2022-12-dtu824g/ Greg
  11. 1 point
    Here is a Sky90/26C OSC CCD and 200mm lens/ASI 2600MC Pro CMOS camera composite of the IC410/405 region - with star reduction This is 30-hours and 37-minutes worth of data. Looks more noisy than it is as this is under half resolution. Greg
  12. 1 point
  13. 1 point
    Lovely deep colours Prof. Ray
  14. 1 point
    Both are simply gorgeous! This one is still on my bucket list along with the California Nebula. I just can't do deep sky and work too. Very nice, Tim.
  15. 1 point
    Another hobby of mine is "experimental mathematics" - I think I may have mentioned (ages ago) my Prime number hunting server. Well way back in June 2007 (just before actually) I discovered something that seems to have been overlooked for centuries - The Golden Solid Angle. Everybody knows the basics, the 1-D Golden Ratio, the 2-D Golden Angle (equal to 2*Pi/Golden Ratio^2) and there it seems to have come to a halt for a few centuries. Why hasn't anybody (until moi) taken this up one further dimension to form the Golden Solid Angle? Or have they? Nobody has got back to me on this and I've not seen it in any book or publication on the subject. So why not? To find the Golden Solid Angle (in steradians) is pretty straightforward. Draw a sphere of radius r with the total surface area of the sphere being 1 + Golden Ratio. Then the solid angle subtended by the unity area part of the sphere is the Golden Solid Angle which is given by 4*Pi/Golden Ratio^2. I have just sent this off to Wolfram Mathematica to see if they will publish it. Way back in 2007 I sent it off to the Mathematical Gazette and they answered - "Just because it is a new discovery in mathematics doesn't make it necessarily publishable" which after a lifetime in science with over 120 refereed research journal publications to my name - was a new one on me. Let's see if the Stephen Wolfram outfit are a little more enlightened - or not Greg
  16. 1 point
    Geesuz Tim, nice work. The geography is really clear to see (including the polar regions). Ray
  17. 1 point
  18. 1 point
    Hah - I didn't think of it being the right way up for you guys I knew I deliberately made it upside down as it just looks better. Greg
  19. 1 point
    That's a very noiseless image Greg. The dust lanes and star burst regions are extremely well captured. Well done. And its up the right way as well! Ray
  20. 1 point
    I've never thought of these as furry, but now I do. Ray
  21. 1 point
    Wow Prof. That is quite stunning. Ray