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The James Webb Space Telescope and stuff


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15 minutes ago, StrandedonEarth said:

Any junk loitering around a Lagrange point would be moving relatively slowly (by astronomical terms) compared to anything else parked there....

Yes, in front of the camera.

Edited by kerbiloid
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Papers about the lensed galaxies in Webb's first image are starting to come out.



"Before Webb imaged it, SMACS J0723 wasn't the star of the show," Pascale said. "Now, suddenly, there's paper after paper on it, which really speaks to how powerful Webb is, to reveal things that we couldn't see before."


discovered 42 new lensed images in the background of the new deep-field image. Gravitational lenses can create multiple images of the same galaxy, so these 42 images represent 19 individual galaxies. Another team, led by Gabriel Caminha of the Max Planck Institute for Astrophysics in Germany, counted 27 new lensed images. 


Whatever the final tally, these lensed images allow scientists to finetune a map of how matter — both visible and dark — is distributed in the SMACS J0723 cluster,


Dazzling James Webb Space Telescope image prompts science scramble | Space



Edited by JoeSchmuckatelli
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Holy Frijoles!





A newfound galaxy dubbed GLASS-z13, which is so far away that we see it as it appeared 300 million years after the Big Bang, now holds the record for the earliest known galaxy. That record is not expected to last long.

Three days later, just minutes before the daily deadline on arxiv.org, the server where scientists can upload early versions of papers, the team submitted their research. They missed out on being first by 13 seconds, “which was pretty funny,” said Pascale.




Article builds on what I posted earlier.

Two Weeks In, the Webb Space Telescope Is Reshaping Astronomy | Quanta Magazine


More pics in the article - which is a good read.  Wait till you see the diff between the galaxy above and Hubble's view of it.

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Isn't this cute: Webb's first SuperNova!


ASTRONOMERS spotted something unusual happening in a distant galaxy in recent images from the James Webb Space Telescope — something that wasn’t there when Hubble last looked at the same galaxy.

"We suspect it's a supernova," astronomer Mike Engesser of the Space Telescope Science Institute (STScI) tells Inverse. Finding short-lived cosmic events like supernovae isn’t what Webb was designed to do, but the newly-operational space telescope seems to be full of surprises. And this one could open the door for looking for the death throes of the universe's first generations of massive stars.


 It's extremely bright compared to the rest of the galaxy, for one thing. And Webb observed the galaxy, called SDSS.J141930.11+5251593, twice, five days apart; the object dimmed, just slightly, over those five days — classic supernova behavior.

The James Webb Space Telescope may have just found its first supernova (inverse.com)

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Also - Webb teams keep finding potentially older galaxies than those written about in the articles above:




Prior to the launch of the James Webb Space Telescope, the most distant confirmed galaxy known was GN-z11, which astronomers saw as it was about 420 million years after the Big Bang, giving it what astronomers call a redshift of 11.6. (Redshift describes how much the light coming from a galaxy has been stretched as the universe expands. The higher the redshift, the farther back in time we see a galaxy.)

Just a week after the release of the first science images from JWST, astronomers were reporting the detection of galaxies at redshift 13, equating to about 300 million years after the Big Bang. Now, a new wave of scientific results is smashing past that record, with some astronomers reporting the detection of galaxies up to a redshift of 20. If true, then we are seeing these galaxies as they existed about 200 million years after the Big Bang.



JWST beats its own record with potential most distant galaxies | Space

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My 5 year old niece is that outdoorsy type of girl, always collecting and bringing home animals to show off.    Basically a Disney Princess (who likes IPA's, but that's a different story).  So one Christmas I got her a junior explorer type kit, binoculars, magnifying glass, net, bug cage, fake pith helmet, all cheap plastic, you know the type.   She ran around the yard the first day finding all this cool stuff with her new instruments. 

We're her.  The scientific community has their new powerful toy, and they're finding all sorts of cool new things they never saw before.   Pretty soon these little discoveries will be mundane as they discover even cooler stuff that was unreachable before. 

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  • 3 weeks later...

There is a python library for JWST data analysis freely available:


Accessing JWST data:


Maybe it tickles somebody to try (and report ;-)) I have no time right now.

Edited by Pixophir
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