Can someone explain to me why the stars have varying hue to them; whitish, bluish, orang-ish.
Is this due to the camera itself or the distance the light has to travel ?
NASA’s Webb takes star-filled portrait of Pillars of Creation
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Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#122Earlier quoted context omitted.
Webb observes "much further" into the IR [1]. 1. https://www.nasa.gov/sites/default/files/thumbnails/image/hu... (this image is from [2]) 2. https://www.nasa.gov/content/goddard/hubble-vs-webb-on-the-s...
Does this mean what Hubble sees is actually closer to what I'd see with my own eyes than Hubble, or Hubble's version is closer?
Ignoring magnification and only considering visible light, Hubble imagery is a colorized version of what you could see if you could stare at an object for hours at a time while accumulating every photon during that time at a 0Hz refresh rate into a single image rather than just seeing new faint photons at a constant refresh rate.
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#123James Webb telescope is great and all, but I have to say I think the older image is more stunning and more aesthetically pleasing. Cleaner, simpler, nicer colors, more mysterious looking.
I like the new image better. The old Hubble image looks like it was generated by Midjourney eg 'Stars being formed in the hand of a galactic titan made from nebulas, mysterious, ethereal, ghostly, digital image, 4K.'
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#124Earlier quoted context omitted.
Webb observes "much further" into the IR [1]. 1. https://www.nasa.gov/sites/default/files/thumbnails/image/hu... (this image is from [2]) 2. https://www.nasa.gov/content/goddard/hubble-vs-webb-on-the-s...
Does this mean what Hubble sees is actually closer to what I'd see with my own eyes than Hubble, or Hubble's version is closer?
Depends on when you would see it. Because of inflation the color of things far away is shifting to longer wavelengths so they become invisible later in the timeline of the universe (invisible to humans).
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#125I understand Nebulae like the Eagle Nebula are fairly dynamic regions of space, so I find it interesting that we have photographs of the same region over a 27 years time span and at a glance, the structure of the Pillars of Creation appears virtually identical. I understand that 27 years is minuscule on the cosmic timescale, but what order of timescale would be necessary for the evolution of Pillars of Creation to be…
A bit more cosmic scale that we can see over time are light echos: https://en.wikipedia.org/wiki/Light_echo In particular, the at https://en.wikipedia.org/wiki/V838_Monocerotis there's a video of the echo. For another dynamic area with things changing on a human lifespan, the black hole at the center of the galaxy we can watch stars orbit it. https://youtu.be/XA7CAVm31z0
Very cool video, but mislabeled. It shows stars approaching and passing their perihelion to SagA* 27Kya, not complete orbits.
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#126[deleted]
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#127Every time I see a photo of Pillars of Creation it makes me wonder if we would even be able to distinguish an unfathomably optimized engineered system from what we consider raw physics with our current understanding.
¿Por qué no los dos?
That's what I've always loved about creation; designed and ordered, with principles and physical constants that result in just so much gobsmacking beauty, from the macro to the micro scale, and yet, it can be intelligible to us in math and science.
Looking up at the night sky, I've always found it to be an awesome experience, in a very literal sense. Looking at these comparisons of the Hubble and Webb images (especially esawebb.org's slider) made me audibly chuckle because I've long been impressed by the Hubble images for all the stars it revealed beyond those visible to ground-based telescopes, much less simple stargazers. With Webb, it just blows my mind how many more stars there are out there; the deeper IR, big mirror, and nice shady spot at L2 result in orders of magnitude difference, and to think of all the stars outside of our Hubble volume that are receding too fast for us to ever witness from here. We live in a truly amazing reality.
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#128I compressed the full PNG via Guetzli (Google's high-quality jpg compressor) which took a couple of hours (now 15MB at 84% quality), so here it is: https://github.com/dvasdekis/images/raw/master/pillars.jpg and https://mega.nz/file/BTdWSb6b#NHK9lAtGMIr1UxabLiC174ZvJWo7KS... and https://www.mediafire.com/file/n0qjxogsp203z0w/pillars.jpg/f... The original crashed Windows when set as desktop background, but this one wor…
> so here it is
you posted 3, are there any differences or just different URLs?
and thanks!
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#129I compressed the full PNG via Guetzli (Google's high-quality jpg compressor) which took a couple of hours (now 15MB at 84% quality), so here it is: https://github.com/dvasdekis/images/raw/master/pillars.jpg and https://mega.nz/file/BTdWSb6b#NHK9lAtGMIr1UxabLiC174ZvJWo7KS... and https://www.mediafire.com/file/n0qjxogsp203z0w/pillars.jpg/f... The original crashed Windows when set as desktop background, but this one wor…
That image has some amount of artifacting around all the stars so I wouldn't advise you to use it. You'll get a lot more quality out of the image just downrezzing and then saving it with a higher jpeg quality setting.
Also I'm not sure why Google would take hours to find a jpeg quality setting. That's a really trivial thing and should only take seconds on a desktop with something like imagemagick.
If you have a faster machine it works no problem to just view it directly: https://stsci-opo.org/STScI-01GFNMZESKZKXBMWGER9E0Z19G.png
Downloaded in less than 30 seconds and firefox handled viewing/panning/scaling it without issue. On an M1 Macbook Air.
Re: NASA’s Webb takes star-filled portrait of Pillars of Creation
#130Also look at the comparison to the Hubble image. https://www.nasa.gov/sites/default/files/thumbnails/image/st... Impressive to see the infrared spectrum seeing through all the background gas to the millions of stars.
Handy Dandy Slider action between the two! https://esawebb.org/images/comparisons/weic2216/
The hubble image looks much more aesthetically pleasing, even though it clearly has less detail.