James Webb first images – complete set of high resolution shots now live

Post by roywiggins » Tue, Jul 12, 2022, 5:05 PM UTC

vishnugupta wrote: post #127

whiteboardr wrote: post #93

Earlier quoted context omitted.

I am aware. (And have been eagerly waiting for this moment for ages) It just seems “unscientific” to just use Photoshop and above all curious about the set of rules and algorithms, that enables them to decide which hue to pick for which region, levels, etc.

The person seen photoshopping very briefly talked about how he picks different colours for different region/light-frequency. But yes, more details will definitely be helpful. Also I guess they could open-source the untouched photos for other artists and photoshop experts to play around?

Post by april_22 » Tue, Jul 12, 2022, 5:07 PM UTC

palmtree3000 wrote: post #107

rootusrootus wrote: post #104

Earlier quoted context omitted.

Thanks for the direct links! > Webb's First Deep Field (NIRCam Image) Is this image distorted in any way at all? It feels like the galaxies are somehow oriented around a center spot. Not all of them, but enough to give the image a distorted feeling. Probably it's just my mind pattern matching against something that doesn't really exist.

Gravitational lensing. From the description[0]: Other features include the prominent arcs in this field. The powerful gravitational field of a galaxy cluster can bend the light rays from more distant galaxies behind it, just as a magnifying glass bends and warps images. Stars are also captured with prominent diffraction spikes, as they appear brighter at shorter wavelengths. [0] https://webbtelescope.org/contents/new…

Post by Keyframe » Tue, Jul 12, 2022, 5:08 PM UTC

ndm000 wrote: post #153

chaps wrote: post #64

Direct links -- Stephan's Quintet (NIRCam and MIRI Composite Image): https://stsci-opo.org/STScI-01G7DB1FHPMJCCY59CQGZC1YJQ.png Southern Ring Nebula (NIRCam and MIRI Images Side by Side): https://stsci-opo.org/STScI-01G79R28V7S4AXDN8NG5QCPGE3.png “Cosmic Cliffs” in the Carina Nebula (NIRCam Image): https://stsci-opo.org/STScI-01G7ETPF7DVBJAC42JR5N6EQRH.png Webb's First Deep Field (NIRCam Image): https://stsci-opo.org…

I know nothing about optics. What is the effect that causes the 6 or 8 points of light of come off of bright objects? Does it have to do with the hex-shaped mirrors on JWT?

Post by nabakin » Tue, Jul 12, 2022, 5:10 PM UTC

wolfd wrote: post #80

quaintdev wrote: post #48

Earlier quoted context omitted.

A GIF comparing both Hubble and JWST https://i.redd.it/9uyhwijeo0b91.gif

I made this page (posted in another thread yesterday) because I was rather underwhelmed by the .gif. I think the page shows in much better detail the difference between the telescopes' capabilities. https://blog.wolfd.me/hubble-jwst/ (If you're on mobile, you should be able to zoom in and still use the slider)

Post by clint » Tue, Jul 12, 2022, 5:11 PM UTC

whiteboardr wrote: post #137

jacquesm wrote: post #99

Earlier quoted context omitted.

The difference between 'actual science' and 'some touched up version of objects in our universe' is smaller than you might think: no matter how good your eyes, if there was no frequency shift involved you would not be able to perceive the image, other than as an array of numbers. To facilitate your consumption of the data it has to be frequency shifted and the easiest way to do this is to map the IR intensity to a ra…

Thanks, but how is the sausage made then? Guess, that’s my main question. I get that the aquired data needs to be transformed in a way so we get an image that depicts a reality we can visually process. I honestly thought there’s some tools in Nasa’s imaging group that, based on scientific rules, pumps out an image that is correct - seeing Photoshop in use left me wonder… I get that the investment needs to be “sold” t…