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The Helix Nebula ( NGC 7293, The Eye of God ) in the constellation Aquarius. ( click on image to see larger ) The visible remains of a star that died around 10,000 years ago, the Helix Nebula ( NGC 7293 ) is one of the closest and largest of the so-called planetary nebulae that are observable from Earth. Situated in the same arm of the Milkyway galaxy as ourselves, the Helix Nebula is around 650 light years away, is growing at a rate of over 100,000 kms / hour and is currently around 2.5 light years across. ............... 34 minutes (17 x 120 sec subs) unmodified DSLR from moderately light polluted skies up in the Blue Mountains, 100 kms west of Sydney - The moon is out now so I will have to wait a week or so to see if I can add to it to try to bring out more from the background. Details: RA 22h 30m 33.9s, Dec -20deg 44' 57.1"' Skywatcher Quattro 10" f4 Newtonian Skywatcher AZ Eq6 GT Mount Orion auto guider - PHD2 Baader MPCC Mark 3 Coma Corrector Nikon D5300 (unmodified) Field of view (deg) ~ 1.35 x 0.90 long exp. noise reduction on 17 x 120 sec ISO800 Pixinsight & Photoshop 12 August 2016. Links: https://500px.com/MikeODay http://photo.net/photos/MikeODay
This one has been on my bucket list for ages, I'm well pleased to get this. The advantage of having a southerly site I guess. 24x600s Ha, 15x240s L, R, G & B all 1x1 binned, darks, flats and bias, equipment as per sig, Pixinxight. The Helix Nebula (NGC 7293) is a large planetary nebula located in the constellation Aquarius. It is one of the closest planetary nebulae to the Earth at an estimated distance is about 700 light-years. It was formed by an intermediate to low-mass star, which shed its outer layers near the end of its evolution. The remnant central stellar core is destined to become a white dwarf star. The observed glow of the central star is so energetic that it causes the previously expelled gases to brightly fluoresce. A fun fact - if you zoom in on Flickr you can see hundreds of comet-like streaks at the inner edge of the red ring that point towards the middle - well the blob at the head of *each* one of those is (very) roughly the size of our whole solar system ! Again, just for fun, here was my first attempt from a few years back, with an unmodded DSLR. Which one do you prefer ? Hope you enjoy, comments and cc welcome, Cheers, Stuart
Hello everyone, Finally I finished the Helix nebula image. This image has been exposed across 4 nights, 2 nights through a HAlpha filter and 2 nights through a OIII filter using my modded 40D. Helix nebula is fainter than I thought it was going to be, I had to image it at ISO800 30 minute HAlpha subs and ISO1250 OIII 30 minute subs, total of 8 hours through each through my 8" SCT at F10. I just wish I captured more clearly the comet shock waves visible in the Hubble images... But overall I'm happy with how it came out... As always there is room for improvement... Any comments and tips welcome... Thanks for looking... Mariusz