Far fewer than one might imagine. We have a lookback time over 10 billion years in those that are beyond the galactic cluster, less time to evolve from the complex elements of multiple generations of starstuff. They are looking at a Milky Way billions of years before the Earth formed.

They could certainly be handled better than they currently are in STScI pipeline processing. Here is just one filter of this observation: an area with full coverage of the four dithers, made of exposures with ten integration groups each... and we still get the halo rings of poorly-removed "snowballs" peppering our picture:

https://i.imgur.com/aVEQDWB.jpg

Now overlay six layers of that.

And here's an animated GIF of the exposures that make up a dithering, with the constant sparkles and some incidental streaks of lower energy cosmic rays that should have been cleaned by earlier ramp jump detection, becoming a background noise:

https://i.imgur.com/lE8Yqyl.gif

You can see some of this in a square at the center of the left edge of the Abell image with low dither coverage.

In the last frame of the GIF, see both a "removed" snowball in the middle, and an unremoved blob at the lower edge.

The solution is many more shorter dither observations, and processing that takes a comprehensive start-to-end removal strategy.

I assume you mean this galaxy, located at 00:14:20.5913283 -30:23:08.694830 seen here in RGBB: 277, 200, 150, 115: https://i.imgur.com/Ct8uioP.png

I think we have arm features seen edge-on, like other galaxies that have a ring-like appearance. The two dots look quite green in 200W because there is a large loss of angular resolution when we step to redder 277W using the longwave part of the instrument.

They also do not bear the same z redshift signature of being the same source. In my sensitive mapping, they have a ratio 0.85, 0.75, 1.10 in 150, 200, 277 with a four-pixel encirclement. Luminance difference showing here: https://i.imgur.com/eNRMwJh.jpg

Overlaying the field's calculated angular offset gradient, we do not see the warp required for a mirroring: https://i.imgur.com/BJYJOT9.jpg

There's lots of galactic companions brought out in this image, some likely to be coincidental, but others that appear even purple, from both a strong short and long infrared-shifted component of star formation in early globular clusters.

This is a lossless PNG after you click on it, 3840x3840. If you can't right-click, https://i.redd.it/9ad48phv7iv91.png

Working resolution of both dithered modules was over 40000 pixels when I do subpixel alignment, but this depicted area is essentially 2048x2048 of a single NIRCam longwave sensor (expanded a bit by dither), overlaid with a grid of four of the same sensors in shortwave, so there is not more information to be seen.

Here's a full view of both modules at slightly higher resolution, but without a lot of the work done for presentation, download button lower right: https://lensdump.com/i/1yhJhe

"4k" does not define moving pictures, but rather, a resolution. This image is 3840 pixels wide - and so is a 4k UHD display you might be viewing it on.

Mass, warping spacetime. (Let me know when you invent a telescope that sees "black" and "dark" things...)

Abell 2744 is itself featured on the Wikipedia gravitational lens page.

Maybe closer to a thousand cosmic ray artifacts across six different filters, from Webb's NIRCam sensor being struck by high-energy particles during long exposures, leaving both a ring-shaped halo when they are removed, and a picture peppered with dots when they aren't recognized by the ground processing.

With other tedious astro magic; I think I improved a bit on another "I processed" post from earlier this week: https://i.imgur.com/Pxy42Mh.png (we can now recognize the mirrored image of galaxies)

This galaxy's fireworks show is sure to challenge our understanding: https://i.imgur.com/oaaNUM9.jpg

Ad for your ad spamming spam.

Why not just upload medical records directly to Facebook?

There is nothing for you on Instragram except for having every interest of yours turned into a data product for sale.

That's just part of the script that is used every time by these pandering posts. "I spent my life savings to take 100000 pictures of the sun in Mexico" = I am poor and took a video. The same script from online social media spamming guides for game developers, "Me and two friends spent two years on this (insert ad)".

Reallllly? Because it actually takes work to recover a moon surface out of the oversharpened ringing black and white pixels meant to fool rubes: https://i.imgur.com/q4BXW4H.png

Thanks for pointing an actual big-ass telescope at the moon and showing the color and background that comes out of a bayer sensor.

Don't worry, we have the technology to fix this electromagnetic insult:

https://i.imgur.com/lDcJPFL.jpg