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General => Science => Topic started by: Tank on December 29, 2015, 05:13:42 PM

Title: James Webb Space Telescope
Post by: Tank on December 29, 2015, 05:13:42 PM
James Webb Space Telescope Mirror Installation Reaches Halfway Point (http://www.universetoday.com/123792/james-webb-space-telescope-mirror-installation-reaches-halfway-point/)

(https://www.happyatheistforum.com/forum/proxy.php?request=http%3A%2F%2Fi2.wp.com%2Fwww.universetoday.com%2Fwp-content%2Fuploads%2F2015%2F12%2Fmirror9a-jwst.jpg&hash=24bae390647778b720ba805f7052f51121e2395a)

After Hubble you can bet your life this one will have been tested to death!

EDIT: Generalised the thread title.
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Icarus on January 05, 2016, 02:33:37 AM
That thing is spectacular. It is a testament to the human dedication to discovery. I am justifiably proud of that small segment of humanity that has developed the science and the intellect to make such things possible.
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Tank on December 24, 2021, 09:30:24 AM
Well tomorrow, 25th Dec 2021, the JWST should go into space!

Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: billy rubin on December 24, 2021, 02:32:47 PM
Quote from: Tank on December 29, 2015, 05:13:42 PM

After Hubble you can bet your life this one will have been tested to death!

i think the most impressive thing about the hubble project was that they were able to fix it
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Tank on December 24, 2021, 03:21:05 PM
Quote from: billy rubin on December 24, 2021, 02:32:47 PM
Quote from: Tank on December 29, 2015, 05:13:42 PM

After Hubble you can bet your life this one will have been tested to death!

i think the most impressive thing about the hubble project was that they were able to fix it

I agree. The optics that they used for the correction were/are the most accurate ever made.
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Icarus on December 25, 2021, 12:44:10 AM
I am a bit confused about the schedule for the Launch of that spectacular piece of scientific endeavor. According to news, spread of the separate leaves are being tested to determine the dependability of the machine to do what it is supposed to do.

The leaves of the golden mirror must be folded so as to fit inside the rocket body that will deliver it some one and a half million miles into space.  The last I read was that the actual launch is scheduled for some time in October 2022. The hugely expensive project of 30 years of expense and effort had damned well better get it right the first time.  The involved individuals are being more than extremely careful about the whole deal.

Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Dark Lightning on December 25, 2021, 01:32:12 AM
I used to work in aerospace and defense. The launch of booster vehicles and the deployment of payloads is a very mature technology. Then again, things can go wrong in a myriad of ways. Knowing the people who worked on the alignment and deployment efforts over the years, it should be OK.
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Tank on December 25, 2021, 10:45:33 AM
Almost time!
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Tank on December 25, 2021, 12:06:14 PM
14 minutes to launch.
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Tank on December 25, 2021, 12:35:50 PM
It's up and safe so far!
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Icarus on December 25, 2021, 09:27:50 PM
I have obviously misread the launch date from a BBC source. My Bad.   

Hooray, it is on its' way.
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Tank on December 25, 2021, 10:23:15 PM
Quote from: Icarus on December 25, 2021, 09:27:50 PM
I have obviously misread the launch date from a BBC source. My Bad.   

Hooray, it is on its' way.

No, it was supposed to go up earlier. The most recent delay was a catch that snapped open and subjected the telescope to 'unexpected shock'. So it had to be checked over.
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Recusant on December 28, 2021, 05:39:06 AM
Glad it got safely out of our gravity well. It appears to be carrying on with the "two weeks of terror (https://www.bbc.com/news/science-environment-59138682)" in good fettle as well. Touch wood.  ;)
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Recusant on January 10, 2022, 06:38:44 AM
A successful deployment.  :dance:

"Webb Space Telescope's 'Golden Eye' Opens, Last Major Hurdle" | Voice of America (https://www.voanews.com/a/webb-space-telescope-s-golden-eye-opens-last-major-hurdle/6388457.html)

Quote
NASA's new space telescope opened its huge, gold-plated, flower-shaped mirror Saturday, the final step in the observatory's dramatic unfurling.

The last portion of the 6.5-meter (21-foot) mirror swung into place at flight controllers' command, completing the unfolding of the James Webb Space Telescope.

"I'm emotional about it. What an amazing milestone. We see that beautiful pattern out there in the sky now," said Thomas Zurbuchen, chief of NASA's science missions.

More powerful than the Hubble Space Telescope, the $10 billion Webb will scan the cosmos for light streaming from the first stars and galaxies formed 13.7 billion years ago. To accomplish this, NASA had to outfit Webb with the largest and most sensitive mirror ever launched—its "golden eye," as scientists call it.

Webb is so big that it had to be folded origami-style to fit in the rocket that soared from South America two weeks ago. The riskiest operation occurred earlier in the week, when the tennis court-size sunshield unfurled, providing subzero shade for the mirror and infrared detectors.

Flight controllers in Baltimore began opening the primary mirror Friday, unfolding the left side like a drop-leaf table. The mood was even more upbeat Saturday, with peppy music filling the control room as the right side snapped into place. After applauding, the controllers immediately got back to work, latching everything down. They jumped to their feet and cheered when the operation was finally complete two hours later.

[Continues . . . (https://www.voanews.com/a/webb-space-telescope-s-golden-eye-opens-last-major-hurdle/6388457.html)]
Title: Re: James Webb Space Telescope Mirror Installation Reaches Halfway Point
Post by: Tank on January 10, 2022, 08:45:46 AM
 :love: :frolic: :frolic: :frolic: :frolic: :frolic: :love:
Title: Re: James Webb Space Telescope
Post by: Icarus on January 12, 2022, 12:13:22 AM
The Webb telescope is by all measures, a magnificent human achievement. 

If it works as intended, there may be some serious kickback. Many individuals will resist learning that the Genisis tale of the Christian bible, is not an accurate account of the way that our earth began.

The machine has already gotten the descriptive moniker, Golden Eye.
Title: Re: James Webb Space Telescope
Post by: billy rubin on January 12, 2022, 12:24:34 AM
Quote from: Icarus on January 12, 2022, 12:13:22 AM
The Webb telescope is by all measures, a magnificent human achievement. 

If it works as intended, there may be some serious kickback. Many individuals will resist learning that the Genisis tale of the Christian bible, is not an accurate account of the way that our earth began.

The machine has already gotten the descriptive moniker, Golden Eye.

are you familiar with lastthursdayism, icarus?

its a logically necessary foundation of special creation that illustrates why creationism can never be proven wrong, or any other formayion theory be proven right.

creationists are generally too ignorant to be aware of it, but they should be
Title: Re: James Webb Space Telescope
Post by: Icarus on January 12, 2022, 12:38:59 AM
I continue to learn from my HAF peers. No, I have no familiarity with the term, Lastthursdayism.  I gotta google that previously oblivious concept.

Learning stuff is part of the reason that I like it here. True even if Billy is pulling my leg, which is a possibility of course.  :)
Title: Re: James Webb Space Telescope
Post by: billy rubin on January 12, 2022, 01:50:49 AM
no, lastthursdayism is cinsidered a joke by people who dont think carefully  about creationism and its implications. but its dead serious, and is why a creation story such as that of the jews cannot be refuted scientifically. real special creation is impervious to geology, radiometric dating, cosmology and so on.

i veneralky dont bring it upbecause people get pissed off when their sacred cow isnt respected, but i lapsed here
Title: Re: James Webb Space Telescope
Post by: Tank on February 21, 2022, 05:21:25 PM
This file shows the details of the pre-operation cooling progress.

https://ntrs.nasa.gov/api/citations/20205010662/downloads/SPIE%20Commissioning%20Presentation%20Feinberg%5B1%5D%20%20-%20%20Read-Only.pptx.pdf?fbclid=IwAR2CafDrX-m8L071qpBinun0hJQRwKHezm2ndP9CNNZ-1c7cdYWylgYKT1M
Title: Re: James Webb Space Telescope
Post by: Recusant on March 21, 2022, 03:39:22 PM
The Webb telescope is now fully aligned optically, a major step toward full operation.

"NASA's Webb Reaches Alignment Milestone, Optics Working Successfully" | NASA (https://www.nasa.gov/press-release/nasa-s-webb-reaches-alignment-milestone-optics-working-successfully)

Quote
(https://www.nasa.gov/sites/default/files/thumbnails/image/telescope_alignment_evaluation_image_labeled.png)

Following the completion of critical mirror alignment steps, NASA's James Webb Space Telescope team expects that Webb's optical performance will be able to meet or exceed the science goals the observatory was built to achieve.

On March 11, the Webb team completed the stage of alignment known as "fine phasing." At this key stage in the commissioning of Webb's Optical Telescope Element, every optical parameter that has been checked and tested is performing at, or above, expectations. The team also found no critical issues and no measurable contamination or blockages to Webb's optical path. The observatory is able to successfully gather light from distant objects and deliver it to its instruments without issue.

Although there are months to go before Webb ultimately delivers its new view of the cosmos, achieving this milestone means the team is confident that Webb's first-of-its-kind optical system is working as well as possible.

"More than 20 years ago, the Webb team set out to build the most powerful telescope that anyone has ever put in space and came up with an audacious optical design to meet demanding science goals," said Thomas Zurbuchen, associate administrator for NASA's Science Mission Directorate in Washington. "Today we can say that design is going to deliver."

While some of the largest ground-based telescopes on Earth use segmented primary mirrors, Webb is the first telescope in space to use such a design. The 21-foot, 4-inch (6.5-meter) primary mirror – much too big to fit inside a rocket fairing – is made up of 18 hexagonal, beryllium mirror segments. It had to be folded up for launch and then unfolded in space before each mirror was adjusted – to within nanometers – to form a single mirror surface.

[Continues . . . (https://www.nasa.gov/press-release/nasa-s-webb-reaches-alignment-milestone-optics-working-successfully)]
Title: Re: James Webb Space Telescope
Post by: Ecurb Noselrub on March 21, 2022, 07:14:14 PM
This is one of the things the USA can do well. Wish we would fund more of this stuff than the things we flub up on so often.
Title: Re: James Webb Space Telescope
Post by: billy rubin on March 21, 2022, 08:11:00 PM
" . . . adjusted to within nanometers?"

many nanometers, i think.
Title: Re: James Webb Space Telescope
Post by: Dark Lightning on March 21, 2022, 11:44:40 PM
Single-digit nanometer adjustment capability-

Title: Re: James Webb Space Telescope
Post by: billy rubin on March 22, 2022, 12:33:32 AM
jeez
Title: Re: James Webb Space Telescope
Post by: Dark Lightning on March 22, 2022, 01:42:13 AM
Wicked cool science and engineering, eh?
Title: Re: James Webb Space Telescope
Post by: Recusant on March 22, 2022, 05:01:22 AM
Indeed, and thanks for that video. In the comments the engineer who wrote the paper that the videographer used to replicate the actuator tells us that the original model was built with Legos.  :smokin cool:
Title: Re: James Webb Space Telescope
Post by: Dark Lightning on March 22, 2022, 01:49:59 PM
That's way cheaper than even using a 3-D printer! Smart move on their part.
Title: Re: James Webb Space Telescope
Post by: Recusant on May 10, 2022, 10:58:16 PM
The GIF below shows the contrast between the previous best infrared space telescope and the infrared capabilities of the Webb telescope.

(https://i.imgur.com/DLwCpkr.gif)
Credit: NASA/ESA/CSA/STScI


"MIRI's Sharper View Hints at New Possibilities for Science" | NASA (https://blogs.nasa.gov/webb/2022/05/09/miris-sharper-view-hints-at-new-possibilities-for-science/)

QuoteNASA's James Webb Space Telescope is aligned across all four of its science instruments, as seen in a previous engineering image showing the observatory's full field of view. Now, we take a closer look at that same image, focusing on Webb's coldest instrument: the Mid-Infrared Instrument, or MIRI.

The MIRI test image (at 7.7 microns) shows part of the Large Magellanic Cloud. This small satellite galaxy of the Milky Way provided a dense star field to test Webb's performance.

Here, a close-up of the MIRI image is compared to a past image of the same target taken with NASA's Spitzer Space Telescope's Infrared Array Camera (at 8.0 microns). The retired Spitzer telescope was one of NASA's Great Observatories and the first to provide high-resolution images of the near- and mid-infrared universe. Webb, with its significantly larger primary mirror and improved detectors, will allow us to see the infrared sky with improved clarity, enabling even more discoveries.

[Continues . . . (https://blogs.nasa.gov/webb/2022/05/09/miris-sharper-view-hints-at-new-possibilities-for-science/)]
Title: Re: James Webb Space Telescope
Post by: Asmodean on May 16, 2022, 09:22:03 AM
Quote from: Recusant on May 10, 2022, 10:58:16 PMThe GIF below shows the contrast between the previous best infrared space telescope and the infrared capabilities of the Webb telescope.

(https://i.imgur.com/DLwCpkr.gif)
Credit: NASA/ESA/CSA/STScI

That one star a bit to the right and below the topmost one of them bright stars... Where did the high-res scope do away with it? HM?! Where, I ask?!  >:(
Title: Re: James Webb Space Telescope
Post by: Recusant on May 17, 2022, 10:37:42 PM
Quote from: Asmodean on May 16, 2022, 09:22:03 AM
Quote from: Recusant on May 10, 2022, 10:58:16 PMThe GIF below shows the contrast between the previous best infrared space telescope and the infrared capabilities of the Webb telescope.

(https://i.imgur.com/DLwCpkr.gif)
Credit: NASA/ESA/CSA/STScI

That one star a bit to the right and below the topmost one of them bright stars... Where did the high-res scope do away with it? HM?! Where, I ask?!  >:(

Yes, that area of the image is intriguing--regrettably the article doesn't address it.
Title: Re: James Webb Space Telescope
Post by: Asmodean on May 18, 2022, 10:58:49 AM
The Asmo hereby suspects some sort of star-death event OR a bad pixel or some such tech voodoo OR having been cheated by the old scope. And/or the new one. :grrr:
Title: Re: James Webb Space Telescope
Post by: Recusant on June 11, 2022, 07:23:30 AM
The interplanetary medium has christened the Webb telescope. Bashed it with a speck of dust travelling at extremely high speed.

"Webb: Engineered to Endure Micrometeoroid Impacts" | NASA (https://blogs.nasa.gov/webb/2022/06/08/webb-engineered-to-endure-micrometeoroid-impacts/)

QuoteMicrometeoroid strikes are an unavoidable aspect of operating any spacecraft, which routinely sustain many impacts over the course of long and productive science missions in space. Between May 23 and 25, NASA's James Webb Space Telescope sustained an impact to one of its primary mirror segments. After initial assessments, the team found the telescope is still performing at a level that exceeds all mission requirements despite a marginally detectable effect in the data. Thorough analysis and measurements are ongoing. Impacts will continue to occur throughout the entirety of Webb's lifetime in space; such events were anticipated when building and testing the mirror on the ground. After a successful launch, deployment, and telescope alignment, Webb's beginning-of-life performance is still well above expectations, and the observatory is fully capable of performing the science it was designed to achieve.

Webb's mirror was engineered to withstand bombardment from the micrometeoroid environment at its orbit around Sun-Earth L2 of dust-sized particles flying at extreme velocities. While the telescope was being built, engineers used a mixture of simulations and actual test impacts on mirror samples to get a clearer idea of how to fortify the observatory for operation in orbit. This most recent impact was larger than was modeled, and beyond what the team could have tested on the ground.

[Continues . . . (https://blogs.nasa.gov/webb/2022/06/08/webb-engineered-to-endure-micrometeoroid-impacts/)]
Title: Re: James Webb Space Telescope
Post by: Recusant on June 17, 2022, 05:55:01 AM
All cooled down and ready to work.  ;D

"The James Webb Space Telescope is finally ready to do science – and it's seeing the universe more clearly than even its own engineers hoped for" | The Conversation (https://theconversation.com/the-james-webb-space-telescope-is-finally-ready-to-do-science-and-its-seeing-the-universe-more-clearly-than-even-its-own-engineers-hoped-for-184989)

QuoteAfter the successful launch of the James Webb Space Telescope on Dec. 25, 2021, the team began the long process of moving the telescope into its final orbital position, unfolding the telescope and – as everything cooled – calibrating the cameras and sensors onboard.

The launch went as smoothly as a rocket launch can go. One of the first things my colleagues at NASA noticed was that the telescope had more remaining fuel onboard than predicted to make future adjustments to its orbit. This will allow Webb to operate for much longer than the mission's initial 10-year goal.

[Detailed description of instruments coming online.]

As of June 15, 2022, all of Webb's instruments are on and have taken their first images. Additionally, four imaging modes, three time series modes and three spectroscopic modes have been tested and certified, leaving just three to go.

On July 12, NASA plans to release a suite of teaser observations that illustrate Webb's capabilities. These will show the beauty of Webb imagery and also give astronomers a real taste of the quality of data they will receive.

After July 12, the James Webb Space Telescope will start working full time on its science mission. The detailed schedule for the coming year hasn't yet been released, but astronomers across the world are eagerly waiting to get the first data back from the most powerful space telescope ever built.

[Link to full article. (https://theconversation.com/the-james-webb-space-telescope-is-finally-ready-to-do-science-and-its-seeing-the-universe-more-clearly-than-even-its-own-engineers-hoped-for-184989)]
Title: Re: James Webb Space Telescope
Post by: Recusant on July 12, 2022, 06:07:30 AM
The first serious image from the Webb telescope is in the major news outlets, but deserves a spot in this thread.

(https://i.imgur.com/omiy8s8.jpg)
Image Credit: NASA, ESA, CSA, and STScI

"NASA's Webb Delivers Deepest Infrared Image of Universe Yet" | NASA (https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-delivers-deepest-infrared-image-of-universe-yet)

QuoteNASA's James Webb Space Telescope has produced the deepest and sharpest infrared image of the distant universe to date. Known as Webb's First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail.

Thousands of galaxies – including the faintest objects ever observed in the infrared – have appeared in Webb's view for the first time. This slice of the vast universe covers a patch of sky approximately the size of a grain of sand held at arm's length by someone on the ground.

This deep field, taken by Webb's Near-Infrared Camera (NIRCam), is a composite made from images at different wavelengths, totaling 12.5 hours – achieving depths at infrared wavelengths beyond the Hubble Space Telescope's deepest fields, which took weeks.

The image shows the galaxy cluster SMACS 0723 as it appeared 4.6 billion years ago. The combined mass of this galaxy cluster acts as a gravitational lens, magnifying much more distant galaxies behind it. Webb's NIRCam has brought those distant galaxies into sharp focus – they have tiny, faint structures that have never been seen before, including star clusters and diffuse features. Researchers will soon begin to learn more about the galaxies' masses, ages, histories, and compositions, as Webb seeks the earliest galaxies in the universe.

This image is among the telescope's first-full color images. The full suite will be released Tuesday, July 12, beginning at 10:30 a.m. EDT, during a live NASA TV broadcast. Learn more about how to watch (https://www.nasa.gov/press-release/nasa-updates-coverage-for-webb-telescope-s-first-images-reveal).

[Link to NASA page (https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-delivers-deepest-infrared-image-of-universe-yet)]
Title: Re: James Webb Space Telescope
Post by: Recusant on July 22, 2022, 12:23:06 AM
Possible image of the most distant (and therefore oldest) galaxy yet observed, from the Webb telescope. Just a red blob, but its light comes to us across an immense expanse of space.

"Webb telescope may have already found most distant known galaxy" | Phys.org (https://phys.org/news/2022-07-webb-telescope-distant-galaxy.html)

QuoteJust a week after its first images were shown to the world, the James Webb Space Telescope may have found a galaxy that existed 13.5 billion years ago, a scientist who analyzed the data said Wednesday.

Known as GLASS-z13, the galaxy dates back to 300 million years after the Big Bang, about 100 million years earlier than anything previously identified, Rohan Naidu of the Harvard Center for Astrophysics told AFP.

"We're potentially looking at the most distant starlight that anyone has ever seen," he said.

[Continues . . . (https://phys.org/news/2022-07-webb-telescope-distant-galaxy.html)]

A pre-print version of the paper is available:

"Two Remarkably Luminous Galaxy Candidates at z ≈ 11 − 13 Revealed by JWST" | arxiv (https://arxiv.org/pdf/2207.09434.pdf)
Title: Re: James Webb Space Telescope
Post by: Tom62 on July 22, 2022, 12:23:21 PM
I just heard that the Webb telescope was damaged. It was hit by a micrometeoroid.
Title: Re: James Webb Space Telescope
Post by: billy rubin on July 22, 2022, 06:53:43 PM
https://www.washingtonexaminer.com/news/james-webb-telescope-faces-damage-micrometeoroid-hit

oops

A micrometeoroid that hit the James Webb Space Telescope in May caused a "significant uncorrectable change" to one of its panels used to observe deep space.

So far, Webb has faced at least six deformations on its main mirror panels that have been traced to micrometeoroid strikes, but five of those degradations were negligible or correctable by adjusting the processing formulas, per NASA. The strike in May, however, does not appear to be correctable and slightly reduces the breadth of accurate data the telescope can collect.
Title: Re: James Webb Space Telescope
Post by: Recusant on July 23, 2022, 06:19:21 AM
They have no plans to make service visits to it, as far as I have been able to find. It's a long ride out there--1.6 million kilometers. They don't know how common this sort of impact will be in that orbit, either. Meanwhile, it's performing splendidly. :dance:
Title: Re: James Webb Space Telescope
Post by: Ecurb Noselrub on July 26, 2022, 01:20:07 AM
I read that the one image you posted is a picture of a sector of space equivalent to the area behind a grain of sand held at arm's length. That is simply incomprehensible.
Title: Re: James Webb Space Telescope
Post by: Recusant on July 26, 2022, 06:46:18 AM
Quote from: Ecurb Noselrub on July 26, 2022, 01:20:07 AMI read that the one image you posted is a picture of a sector of space equivalent to the area behind a grain of sand held at arm's length. That is simply incomprehensible.

Yeah, if anything qualifies as mind-blowing, that detail is. Gives a hint at how big the Universe is, and how much stuff is out there. I don't think that area is a particularly crowded part of it, either.
Title: Re: James Webb Space Telescope
Post by: Asmodean on July 26, 2022, 12:24:53 PM
Quote from: Recusant on July 12, 2022, 06:07:30 AM
(https://i.imgur.com/omiy8s8.jpg)
Image Credit: NASA, ESA, CSA, and STScI
There be a whole bunch of lensing of what appears to be the same object over there *point.*

...Fascinating.
Title: Re: James Webb Space Telescope
Post by: Tank on August 02, 2022, 12:39:01 PM
A truly amazing achievement for an ape with just enough brains to be dangerous!
Title: Re: James Webb Space Telescope
Post by: Ecurb Noselrub on August 03, 2022, 06:36:06 PM
Tank, how are you doing?
Title: Re: James Webb Space Telescope
Post by: Tank on August 03, 2022, 07:27:10 PM
Quote from: Ecurb Noselrub on August 03, 2022, 06:36:06 PMTank, how are you doing?

Ok thanks. While I was away I had sepsis, Covid and a very, very minor heart attack, probably brought on by the sepsis.  ;D
Title: Re: James Webb Space Telescope
Post by: Tank on August 04, 2022, 10:27:33 AM
The latest news is here https://webb.nasa.gov/content/webbLaunch/news.html
Title: Re: James Webb Space Telescope
Post by: billy rubin on August 04, 2022, 01:17:48 PM
jeez

and a car crash on the way back maybe?

Title: Re: James Webb Space Telescope
Post by: Recusant on August 05, 2022, 07:44:44 AM
Quote from: Tank on August 03, 2022, 07:27:10 PM
Quote from: Ecurb Noselrub on August 03, 2022, 06:36:06 PMTank, how are you doing?

Ok thanks. While I was away I had sepsis, Covid and a very, very minor heart attack, probably brought on by the sepsis.  ;D

And now you're trim and shipshape, eh lad?

Some dancing galaxies to celebrate! It's worth clicking through to the full size image on the NASA site.

(https://i.imgur.com/bUOAML7.jpg)
Image credit: NASA, ESA, CSA, and STScI

"NASA's Webb Sheds Light on Galaxy Evolution, Black Holes" | NASA (https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-sheds-light-on-galaxy-evolution-black-holes)

QuoteStephan's Quintet, a visual grouping of five galaxies, is best known for being prominently featured in the holiday classic film, "It's a Wonderful Life." Today, NASA's James Webb Space Telescope reveals Stephan's Quintet in a new light. This enormous mosaic is Webb's largest image to date, covering about one-fifth of the Moon's diameter. It contains over 150 million pixels and is constructed from almost 1,000 separate image files. The information from Webb provides new insights into how galactic interactions may have driven galaxy evolution in the early universe.

With its powerful, infrared vision and extremely high spatial resolution, Webb shows never-before-seen details in this galaxy group. Sparkling clusters of millions of young stars and starburst regions of fresh star birth grace the image. Sweeping tails of gas, dust and stars are being pulled from several of the galaxies due to gravitational interactions. Most dramatically, Webb captures huge shock waves as one of the galaxies, NGC 7318B, smashes through the cluster.

[Continues . . . (https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-sheds-light-on-galaxy-evolution-black-holes)]
Edited to repair links. - R

Title: Re: James Webb Space Telescope
Post by: Tank on August 05, 2022, 08:06:30 AM
I clicked through and didn't end up at NASA.  :???:
Title: Re: James Webb Space Telescope
Post by: Asmodean on August 05, 2022, 08:07:50 AM
https://www.nasa.gov/sites/default/files/thumbnails/image/main_image_galaxies_stephans_quintet_sq_nircam_miri_final-5mb.jpg
Title: Re: James Webb Space Telescope
Post by: Tank on August 05, 2022, 08:10:16 AM
 :cheerful dance 2:  :not worthy:  :yes!:
Title: Re: James Webb Space Telescope
Post by: Recusant on August 05, 2022, 08:15:34 AM
Quote from: Tank on August 05, 2022, 08:06:30 AMI clicked through and didn't end up at NASA.  :???:

Sorry about that--thanks for letting me know. I've repaired the links to the story at NASA.
Title: Re: James Webb Space Telescope
Post by: Tank on August 05, 2022, 08:18:49 AM
 :fixed:
Title: Re: James Webb Space Telescope
Post by: Asmodean on August 05, 2022, 08:20:15 AM
...I want a much bigger monitor with far more pixels  :(
Title: Re: James Webb Space Telescope
Post by: Tank on August 05, 2022, 08:27:31 AM
Quote from: Asmodean on August 05, 2022, 08:20:15 AM...I want a much bigger monitor with far more pixels  :(

Always.
Title: Re: James Webb Space Telescope
Post by: Tank on August 05, 2022, 01:36:22 PM
Wide view of early universe hints at galaxy among earliest ever detected (https://phys.org/news/2022-08-wide-view-early-universe-hints.html)

"Two new images from NASA's James Webb Space Telescope show what may be among the earliest galaxies ever observed. Both images include objects from more than 13 billion years ago, and one offers a much wider field of view than Webb's First Deep Field image, which was released amid great fanfare July 12. The images represent some of the first out of a major collaboration of astronomers and other academic researchers teaming with NASA and global partners to uncover new insights about the universe."

Link to image. (https://phys.org/news/2022-08-wide-view-early-universe-hints.html)
Title: Re: James Webb Space Telescope
Post by: billy rubin on August 05, 2022, 03:34:53 PM
i can see your house from here
Title: Re: James Webb Space Telescope
Post by: Essie Mae on August 06, 2022, 12:28:55 AM
Quote from: Tank on August 05, 2022, 01:36:22 PMWide view of early universe hints at galaxy among earliest ever detected (https://phys.org/news/2022-08-wide-view-early-universe-hints.html)

"Two new images from NASA's James Webb Space Telescope show what may be among the earliest galaxies ever observed. Both images include objects from more than 13 billion years ago, and one offers a much wider field of view than Webb's First Deep Field image, which was released amid great fanfare July 12. The images represent some of the first out of a major collaboration of astronomers and other academic researchers teaming with NASA and global partners to uncover new insights about the universe."

Link to image. (https://phys.org/news/2022-08-wide-view-early-universe-hints.html)

This is mind blowing.
Title: Re: James Webb Space Telescope
Post by: Recusant on August 06, 2022, 05:11:55 AM
Lovely to see you here again, Essie Mae! It has been a while.  :hey:
Title: Re: James Webb Space Telescope
Post by: Recusant on August 06, 2022, 05:27:16 AM
Welp, the Webb telescope can see a slice of Spanish chorizo.  :thoughtful:

"French scientist Etienne Klein apologises after 'James Webb Telescope' image revealed as slice of chorizo" | ABC (https://www.abc.net.au/news/2022-08-05/french-scientist-apologises-for-chorizo-star-joke/101305334)

QuoteA senior French scientist has apologised after tweeting a picture which he said was from the James Webb Space Telescope — but which was not quite what it seemed.

Etienne Klein, a director at France's Atomic Energy Commission, posted a picture purportedly showing Proxima Centauri, the closest star to our sun.

"This level of detail ... a new world is revealed every day", he enthused in the tweet, sent to more than 90,000 followers on Monday.

However, Professor Klein has now admitted that the glowing celestial body shown was in fact nothing more than a slice of Spanish chorizo sausage.

[. . .]

Apologising for what he described as "a scientist's joke", he said his aim had been to remind people to "be wary of arguments from people in positions of authority".

"I come to present my apologies to those who may have been shocked by my prank, which had nothing original about it," he tweeted.

[Continues . . . (https://www.abc.net.au/news/2022-08-05/french-scientist-apologises-for-chorizo-star-joke/101305334)]
Title: Re: James Webb Space Telescope
Post by: Magdalena on August 06, 2022, 07:13:35 AM
Quote from: Recusant on August 06, 2022, 05:27:16 AMWelp, the Webb telescope can see a slice of Spanish chorizo.  :thoughtful:

"French scientist Etienne Klein apologises after 'James Webb Telescope' image revealed as slice of chorizo" | ABC (https://www.abc.net.au/news/2022-08-05/french-scientist-apologises-for-chorizo-star-joke/101305334)

QuoteA senior French scientist has apologised after tweeting a picture which he said was from the James Webb Space Telescope — but which was not quite what it seemed.

Etienne Klein, a director at France's Atomic Energy Commission, posted a picture purportedly showing Proxima Centauri, the closest star to our sun.

"This level of detail ... a new world is revealed every day", he enthused in the tweet, sent to more than 90,000 followers on Monday.

However, Professor Klein has now admitted that the glowing celestial body shown was in fact nothing more than a slice of Spanish chorizo sausage.

[. . .]

Apologising for what he described as "a scientist's joke", he said his aim had been to remind people to "be wary of arguments from people in positions of authority".

"I come to present my apologies to those who may have been shocked by my prank, which had nothing original about it," he tweeted.

[Continues . . . (https://www.abc.net.au/news/2022-08-05/french-scientist-apologises-for-chorizo-star-joke/101305334)]


Proxima Centauri, the closest star to our sun? Or...
(https://pbs.twimg.com/media/FZAV0R1XoAEXE14?format=jpg&name=small)
...A slice of Spanish chorizo sausage?

Answer: Both are alternative facts.

Truth:
A slice of a, "4D sausage along the time axis."

 :reading:
Title: Re: James Webb Space Telescope
Post by: Asmodean on August 06, 2022, 07:37:41 AM
Quote from: Magdalena link=msg=420654A slice of a, "4D sausage along the time axis."

 :reading:

A slice across time and the plane of the telescope's field of view. :smilenod:
Title: Re: James Webb Space Telescope
Post by: Magdalena on August 06, 2022, 08:30:00 AM
Quote from: Asmodean on August 06, 2022, 07:37:41 AM
Quote from: Magdalena link=msg=420654A slice of a, "4D sausage along the time axis."

 :reading:
A slice across time and the plane of the telescope's field of view. :smilenod:


Quote...the plane of the telescope's field of view.
Got it.

See?
I pay attention.
(https://i.gifer.com/IWq.gif)

 ;D
Title: Re: James Webb Space Telescope
Post by: Tank on August 06, 2022, 08:53:52 AM
He really should have waited till 1st April to do that :rofl:
Title: Re: James Webb Space Telescope
Post by: Asmodean on August 08, 2022, 07:27:48 AM
...Also, should never, ever apologize on Twitter. That place has honed clutching onto any perceived offence and never letting go to an art. A misplaced apology there is likely to have an person up to their neck in sins to repent, and repent immediately and to the mob's satisfaction. Except of course there is no satisfying the mob.

Me, I just tend to get banned from there. With a smile - every time.
Title: Re: James Webb Space Telescope
Post by: Icarus on August 08, 2022, 10:52:46 PM
I watched a Nova (PBS) program about the construction and testing of the JWST.  Fascinating stuff to be sure.  The scientists and engineers were extremely careful about every conceivable detail.  They compiled a list of 334 possible failures that could doom the whole 20+ yearlong project.  They systematically addressed every one of the failure possibilities. That is one of the reasons the project took so long to complete. 

The whole machine was shipped to Houston so that it could be tested in a vacuum chamber whose temperatures could be reduced to more than minus 200 centigrade.  It took 30 days to gradually draw the temp down in the chamber. The Telescope endured the temperatures well enough, then they did the vibration test where the macie was exposed to the vibrations expected during launch and flight in space. An unexpected glitch was revealed.  During vibration tests some bolts and nuts fell off which might endanger the sucess of the whole thing. One more of the failure possibilities was revealed and remedied.

Among the biggest dramas was when the machine was in place and had its heat shields deployed, That was a delicate process that took several days.  After that, the had to adjust each of the mirror leaves so as to focus correctly. All that done while a million miles away.

The whole project was a mind-boggling, spectacular effort on the part of the builders and operators. That is one helluva expensive bit of work. Billions and Billions of dollars were used in the process. At one time congress almost shut the whole thing down because of the enormous expense. Fortunately, they did not cut off the funding.

   
Title: Re: James Webb Space Telescope
Post by: billy rubin on August 09, 2022, 12:55:32 AM
 cool pictures.

are the hungry dalits in india helped on any way by the increased knowledge generated by the telescope?

asking for a friend
Title: Re: James Webb Space Telescope
Post by: Tank on August 09, 2022, 08:10:04 AM
Quote from: billy rubin on August 09, 2022, 12:55:32 AMcool pictures.

are the hungry dalits in india helped on any way by the increased knowledge generated by the telescope?

asking for a friend


No more than the world attack budget.
Title: Re: James Webb Space Telescope
Post by: billy rubin on August 09, 2022, 11:08:06 AM
well thats an excellent point
Title: Re: James Webb Space Telescope
Post by: Tank on August 22, 2022, 03:53:20 PM
James Webb Space Telescope images of Jupiter (https://phys.org/news/2022-08-sharp-james-webb-space-telescope.html)

Just astonishing.

(https://scx2.b-cdn.net/gfx/news/hires/2022/unexpected-details-lea.jpg)
Title: Re: James Webb Space Telescope
Post by: billy rubin on August 22, 2022, 05:21:56 PM
spectacular
Title: Re: James Webb Space Telescope
Post by: Icarus on August 22, 2022, 11:51:43 PM
Jupiter has a belly button.  Who knew?
Title: Re: James Webb Space Telescope
Post by: Tank on August 23, 2022, 07:42:07 AM
:rofl:
Title: Re: James Webb Space Telescope
Post by: Tank on August 26, 2022, 11:11:24 AM
 :frolic:  :frolic:  :frolic:

Webb telescope makes first unequivocal detection of carbon dioxide in an exoplanet atmosphere (https://phys.org/news/2022-08-james-webb-space-telescope-unequivocal.html)

"For the first time, astronomers have found unambiguous evidence of carbon dioxide in the atmosphere of an exoplanet (a planet outside our solar system).

The discovery, accepted for publication in Nature and posted online August 25, demonstrates the power of the James Webb Space Telescope (JWST) to deliver unprecedented observations of exoplanet atmospheres."

Just wait until it detects industrial pollution!
Title: Re: James Webb Space Telescope
Post by: Asmodean on August 26, 2022, 11:27:07 AM
JWST... What other things could that stand for, an person wonders?

Jehova's Witnesses Sex Therapy
Jews Who Sell Truffles
Jamaican Women's Soccer Team
Jim Wanks Sometimes Too

This. It is fun for easily-amused The Asmo. :smilenod:
Title: Re: James Webb Space Telescope
Post by: Tank on August 26, 2022, 11:31:42 AM
 :snicker1:
Title: Re: James Webb Space Telescope
Post by: Icarus on August 26, 2022, 11:37:37 PM
^^   ;D 
Title: Re: James Webb Space Telescope
Post by: Tank on September 01, 2022, 09:34:47 PM
NASA's Webb Takes Its First-Ever Direct Image of Distant World (https://blogs.nasa.gov/webb/2022/09/01/nasas-webb-takes-its-first-ever-direct-image-of-distant-world/)

"For the first time, astronomers have used NASA's James Webb Space Telescope to take a direct image of a planet outside our solar system. The exoplanet is a gas giant, meaning it has no rocky surface and could not be habitable.

The image, as seen through four different light filters, shows how Webb's powerful infrared gaze can easily capture worlds beyond our solar system, pointing the way to future observations that will reveal more information than ever before about exoplanets."

Amazing.

Title: Re: James Webb Space Telescope
Post by: billy rubin on September 02, 2022, 03:51:08 AM
Quote from: Tank on September 01, 2022, 09:34:47 PM"For the first time, astronomers have used NASA's James Webb Space Telescope to take a direct image of a planet outside our solar system. The exoplanet is a gas giant, meaning it has no rocky surface and could not be habitable.


maybe not.

remember nivens integral trees?

you need an atmosphere, but a substrate is not required, theoretically.

https://en.wikipedia.org/wiki/The_Integral_Trees

QuoteNo "ground" exists in the Smoke Ring; it consists entirely of sky. Furthermore, the Smoke Ring is in orbit and therefore in free fall: there is no "up" or "down". Most animals have trilateral symmetry that allows them to see in all directions. The majority of Smoke Ring animals have evolved to fly on at least an occasional basis—even the fish. The Smoke Ring contains numerous "ponds," globs of water of various sizes which float free like everything else. While there are aquatic and amphibious animals in the Smoke Ring that live the majority of their lives in such ponds, these animals may find their habitat unsuitable at any moment. Whether their home pond drifts too far out of the habitable center of the Smoke Ring and into the gas torus, becomes too large and breaks up due to tidal forces, or impacts a large object such as an integral tree, aquatic animals must be able to propel themselves through the air sometimes in order to find a new place to live.
Title: Re: James Webb Space Telescope
Post by: Recusant on October 15, 2022, 04:00:25 PM
Cosmic smoke rings.  ;D

"Alien megastructures? Cosmic thumbprint? What's behind a James Webb telescope photo that had even astronomers stumped" | The Conversation (https://theconversation.com/alien-megastructures-cosmic-thumbprint-whats-behind-a-james-webb-telescope-photo-that-had-even-astronomers-stumped-192249)

QuoteIn July, a puzzling new image of a distant extreme star system surrounded by surreal concentric geometric rungs had even astronomers scratching their heads. The picture, which looks like a kind of "cosmic thumbprint", came from the James Webb Space Telescope, NASA's newest flagship observatory.

The internet immediately lit up with theories and speculation. Some on the wild fringe even claimed it as evidence for "alien megastructures" of unknown origin.

Luckily, our team at the University of Sydney had already been studying this very star, known as WR140, for more than 20 years – so we were in prime position to use physics to interpret what we were seeing.

Our model, published in Nature, explains the strange process by which the star produces the dazzling pattern of rings seen in the Webb image (itself now published in Nature Astronomy).

WR140 is what's called a Wolf-Rayet star (https://en.wikipedia.org/wiki/Wolf%E2%80%93Rayet_star). These are among the most extreme stars known. In a rare but beautiful display, they can sometimes emit a plume of dust into space stretching hundreds of times the size of our entire Solar System.

The radiation field around Wolf-Rayets is so intense, dust and wind are swept outwards at thousands of kilometres per second, or about 1% the speed of light. While all stars have stellar winds, these overachievers drive something more like a stellar hurricane.

Critically, this wind contains elements such as carbon that stream out to form dust.

WR140 is one of a few dusty Wolf-Rayet stars found in a binary system. It is in orbit with another star, which is itself a massive blue supergiant with a ferocious wind of its own.

Only a handful of systems like WR140 are known in our whole galaxy, yet these select few deliver the most unexpected and beautiful gift to astronomers. Dust doesn't simply stream out from the star to form a hazy ball as might be expected; instead it forms only in a cone-shaped area where the winds from the two stars collide.

Because the binary star is in constant orbital motion, this shock front must also rotate. The sooty plume then naturally gets wrapped into a spiral, in the same way as the jet from a rotating garden sprinkler.

[Continues . . . (https://theconversation.com/alien-megastructures-cosmic-thumbprint-whats-behind-a-james-webb-telescope-photo-that-had-even-astronomers-stumped-192249)]

Two papers are available:

"Radiation-driven acceleration in the expanding WR140 dust shell" | Nature (https://www.nature.com/articles/s41586-022-05155-5)

"Nested dust shells around the Wolf–Rayet binary WR 140 observed with JWST" | Nature Astronomy (https://www.nature.com/articles/s41550-022-01812-x)

Title: Re: James Webb Space Telescope
Post by: Tank on October 15, 2022, 05:00:46 PM
Wow!
Title: Re: James Webb Space Telescope
Post by: Recusant on October 17, 2022, 03:58:50 AM
Yeah, it's a great time for astronomy.  :frolic:
Title: Re: James Webb Space Telescope
Post by: Tank on October 17, 2022, 09:05:04 AM
Possibly the greatest time ever? We have great theories to test and the best telescopes that have ever existed.
Title: Re: James Webb Space Telescope
Post by: Dark Lightning on October 17, 2022, 01:01:18 PM
Something that was never mentioned in my solar system astrophysics class. We've learned a lot in the last 40 years.
Title: Re: James Webb Space Telescope
Post by: Asmodean on October 17, 2022, 01:55:57 PM
JWST...  :thoughtful:

Just What Satan Thought.
Journalism Without Scare Tactics.
Jammed Watch Still Ticking.
Juicy Wiener Schnitzel Toast. The Asmo now wants. :smilenod:
Title: Re: James Webb Space Telescope
Post by: Tank on October 19, 2022, 07:59:16 PM
It just keeps getting better and better!

James Webb telescope spies 'Pillars of Creation' (https://www.bbc.co.uk/news/science-environment-63319814)

(https://ichef.bbci.co.uk/news/976/cpsprodpb/0858/production/_127263120_weic2216b.jpg.webp)
Title: Re: James Webb Space Telescope
Post by: Tank on October 19, 2022, 08:36:34 PM
This link has a comparison to the Hubble image which is a good illustration of the visible vs infra-red spectrum images.

Iconic 'Pillars of Creation' captured in new Webb image (https://phys.org/news/2022-10-iconic-pillars-creation-captured-webb.html)
Title: Re: James Webb Space Telescope
Post by: Tank on November 19, 2022, 09:44:56 PM
It's starting to do what it was specifically designed for.

JWST reveals birth of galaxies, how universe became transparent (https://phys.org/news/2022-11-webb-space-telescope-reveals-birth.html)
Title: Re: James Webb Space Telescope
Post by: Tank on November 23, 2022, 09:25:13 AM
James Webb Space Telescope reveals an exoplanet atmosphere as never seen before (https://phys.org/news/2022-11-james-webb-space-telescope-reveals.html)

A step towards the possible confirmation of alien life.
Title: Re: James Webb Space Telescope
Post by: billy rubin on November 23, 2022, 07:13:52 PM
is that cool or what
Title: Re: James Webb Space Telescope
Post by: Tank on November 23, 2022, 09:41:06 PM
It really is amazing isn't it. A few decades ago exoplanets were just a theory and people were saying we'd never know for sure. Now we're analysing their atmospheres! And still we have religions, wars and mass shootings. We really are a fucked up species.
Title: Re: James Webb Space Telescope
Post by: billy rubin on November 23, 2022, 11:24:16 PM
we re no different from any other

its just we have pretensions
Title: Re: James Webb Space Telescope
Post by: Tank on August 26, 2023, 11:09:08 AM
JWST does it again! (https://www.bbc.co.uk/news/science-environment-66397231)

(https://ichef.bbci.co.uk/news/976/cpsprodpb/2E61/production/_130637811_e5e1035c9f8e25c1e01c3ba57d517a073e7b01b0.jpg.webp)
Title: Re: James Webb Space Telescope
Post by: The Magic Pudding.. on August 26, 2023, 02:07:02 PM
Quote from: Tank on August 26, 2023, 11:09:08 AMJWST does it again! (https://www.bbc.co.uk/news/science-environment-66397231)

(https://ichef.bbci.co.uk/news/976/cpsprodpb/2E61/production/_130637811_e5e1035c9f8e25c1e01c3ba57d517a073e7b01b0.jpg.webp)

Is that your lawn?
Title: Re: James Webb Space Telescope
Post by: Tank on August 26, 2023, 02:55:03 PM
Unfortunately not  :(
Title: Re: James Webb Space Telescope
Post by: Icarus on August 26, 2023, 11:25:09 PM
Don't pay attention to those astrophysicist types. It is clear to see that it is a giant eyeball in the sky. Likely a giant aliens eyeball. 
Title: Re: James Webb Space Telescope
Post by: Tank on October 02, 2023, 04:38:39 PM
James Webb telescope makes 'JuMBO' discovery of planet-like objects in Orion (https://www.bbc.co.uk/news/science-environment-66974738)

It can see free floating planets!!!
Title: Re: James Webb Space Telescope
Post by: Asmodean on October 03, 2023, 08:13:13 AM
...Jolly Wankers Sin Together. :smilenod:
Title: Re: James Webb Space Telescope
Post by: Tank on November 04, 2023, 08:42:55 AM
With all there is bad in the world today take heart that humanity can still do things like this.

James Webb telescope: Baby star launches giant jets and shocks (//http://)

(https://ichef.bbci.co.uk/news/976/cpsprodpb/10912/production/_131585876_hh212_jwst_full_20231030.jpg.webp)
Title: Re: James Webb Space Telescope
Post by: Recusant on November 07, 2023, 04:29:52 AM
Yes, it's nice to have good eyes. James Webb's infrared adds something certainly; more detail of a different sort. However in the image below you can see that other details from the Hubble are obscured a bit. A new portrait of the Crab Nebula (link to big image (https://www.nasa.gov/wp-content/uploads/2023/10/webb-stsci-01hbbmj8r6htxp5w1evej24d64.jpg)):

"The Crab Nebula Seen in New Light by NASA's Webb" | NASA (https://www.nasa.gov/missions/webb/the-crab-nebula-seen-in-new-light-by-nasas-webb/)

Quote
(https://i.imgur.com/DpZGnMl.jpg)
This side-by-side comparison of the Crab Nebula as seen by the Hubble Space Telescope in optical light (left) and the James Webb Space Telescope in infrared light (right) reveals different details. By studying the recently collected Webb data, and consulting previous observations of the Crab taken by other telescopes like Hubble, astronomers can build a more comprehensive understanding of this mysterious supernova remnant.
Hubble Image: NASA, ESA, J. Hester, A. Loll (Arizona State University); Webb Image: NASA, ESA, CSA, STScI, T. Temim (Princeton University)





NASA's James Webb Space Telescope has gazed at the Crab Nebula, a supernova remnant located 6,500 light-years away in the constellation Taurus. Since the recording of this energetic event in 1054 CE by 11th-century astronomers, the Crab Nebula has continued to draw attention and additional study as scientists seek to understand the conditions, behavior, and after-effects of supernovae through thorough study of the Crab, a relatively nearby example.

Using Webb's NIRCam (Near-Infrared Camera) and MIRI (Mid-Infrared Instrument), a team led by Tea Temim at Princeton University is searching for answers about the Crab Nebula's origins.

"Webb's sensitivity and spatial resolution allow us to accurately determine the composition of the ejected material, particularly the content of iron and nickel, which may reveal what type of explosion produced the Crab Nebula," explained Temim.

At first glance, the general shape of the supernova remnant is similar to the optical wavelength image released in 2005 from NASA's Hubble Space Telescope: In Webb's infrared observation, a crisp, cage-like structure of fluffy gaseous filaments are shown in red-orange. However, in the central regions, emission from dust grains (yellow-white and green) is mapped out by Webb for the first time.

Additional aspects of the inner workings of the Crab Nebula become more prominent and are seen in greater detail in the infrared light captured by Webb. In particular, Webb highlights what is known as synchrotron radiation: emission produced from charged particles, like electrons, moving around magnetic field lines at relativistic speeds. The radiation appears here as milky smoke-like material throughout the majority of the Crab Nebula's interior.

This feature is a product of the nebula's pulsar, a rapidly rotating neutron star. The pulsar's strong magnetic field accelerates particles to extremely high speeds and causes them to emit radiation as they wind around magnetic field lines. Though emitted across the electromagnetic spectrum, the synchrotron radiation is seen in unprecedented detail with Webb's NIRCam instrument.

[Continues . . . (https://www.nasa.gov/missions/webb/the-crab-nebula-seen-in-new-light-by-nasas-webb/)]

There's a link on the NASA page to download full resolution versions of the images if you want to go for a deeper dive.

Title: Re: James Webb Space Telescope
Post by: Tank on November 07, 2023, 08:30:51 AM
If only more people paid more attention to the world around them than the world in their head.
Title: Re: James Webb Space Telescope
Post by: Recusant on November 15, 2023, 04:05:32 AM
There's something to ponder on. Both are important. Contemporary people are so much more immersed in various media though. The natural world has attention-grabbing competition.

Posssible science fiction idea: A technologically advanced culture that intentionally tried to avoid destroying the environment from its start. Easy to say, but the practicalities would be interesting. One of the aspects of that might be a culture that was not so easily drawn to mental/emotional glitter.


Nah, too utopian.  :chin:





Assisted by a gravitational lens, some big old galaxies:

"Second-most distant galaxy discovered using James Webb Space Telescope" | PennState (https://www.psu.edu/news/eberly-college-science/story/second-most-distant-galaxy-discovered-using-james-webb-space-telescope/)

Quote
(https://i.imgur.com/7TXMzc1.png)
The second- and fourth-most distant galaxies ever seen (UNCOVER z-13 and UNCOVER z-12) have been confirmed using the James Webb Space Telescope's Near-Infrared Camera (NIRCam). The galaxies are located in Pandora's Cluster (Abell 2744), shown here as near-infrared wavelengths of light that have been translated to visible-light colors. The scale of the main cluster image is labelled in arcseconds, which is a measure of angular distance in the sky. The circles on the black-and-white images, showing the galaxies in the NIRCam-F277W filter band onboard JWST, indicate an aperture size of 0.32 arcsec.
Image Credit: Cluster image: NASA, UNCOVER (Bezanson et al., DIO: 10.48550/arXiv.2212.04026). Insets: Nasa, UNCOVER (Wang et al., 2023). Composition: Dani Zemba/Penn State.





The second- and fourth-most distant galaxies ever observed have been discovered in a region of space known as Pandora's Cluster, or Abell 2744, using data from NASA's James Webb Space Telescope (JWST). Following up on a deep field image of the area, an international team led by Penn State researchers confirmed the distance of these ancient galaxies and inferred their properties using new spectroscopic data — information about light emitted across the electromagnetic spectrum — from JWST. At nearly 33 billion light years away, these incredibly distant galaxies offer insights into how the earliest galaxies might have formed.

Unlike other galaxies confirmed at this distance that appear in images as red dots, the new galaxies are larger and appear like a peanut and a fluffy ball, according to the researchers. A paper describing the galaxies appears today (Nov. 13) in the journal Astrophysical Journal Letters.

"Very little is known about the early universe, and the only way to learn about that time and to test our theories of early galaxy formation and growth is with these very distant galaxies," said first author Bingjie Wang, postdoctoral scholar in the Penn State Eberly College of Science and a member of the JWST UNCOVER (Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization) team that conducted the research. "Prior to our analysis, we knew of only three galaxies confirmed at around this extreme distance. Studying these new galaxies and their properties has revealed the diversity of galaxies in the early universe and how much there is to be learned from them."

[Continues . . . (https://www.psu.edu/news/eberly-college-science/story/second-most-distant-galaxy-discovered-using-james-webb-space-telescope/)]

The paper is open access. One note. The "z" notation here describes a redshift number. The higher the number, the greater the redshift and thus the greater distance. Also, this site doesn't support LaTeX, so two equations get a bit mangled in the abstract below.

"Illuminating the Early Universe—JWST/NIRSpec Confirmation of z > 12 Galaxies" | The Astrophysical Journal Letters (https://iopscience.iop.org/article/10.3847/2041-8213/acfe07)

QuoteAbstract:

Observations of high-redshift galaxies provide a critical direct test to the theories of early galaxy formation, yet to date, only three have been spectroscopically confirmed at z > 12. Due to strong gravitational lensing over a wide area, the galaxy cluster field A2744 is ideal for searching for the earliest galaxies. Here we present JWST/NIRSpec observations of two galaxies: a robust detection at zspec = 12.393, and a plausible candidate at zspec = 13.079. The galaxies are discovered in JWST/NIRCam imaging and their distances are inferred with JWST/NIRSpec spectroscopy, all from the JWST Cycle 1 UNCOVER Treasury survey.

Detailed stellar population modeling using JWST NIRCam and NIRSpec data corroborates the primeval characteristics of these galaxies: low mass (∼108M⊙), young, rapidly assembling, metal-poor, and star-forming. Interestingly, both galaxies are spatially resolved, having lensing-corrected rest-UV effective radii on the order of 300–400 pc, which are notably larger than other spectroscopically confirmed systems at similar redshifts.

The observed dynamic range of z ≳ 10 sizes spans over 1 order of magnitude, implying a significant scatter in the size–mass relation at early times. Deep into the epoch of reionization, these discoveries elucidate the emergence of the first galaxies.




Title: Re: James Webb Space Telescope
Post by: Asmodean on November 15, 2023, 07:01:42 AM
...Just Weeding Small Tomatos. :smilenod:
Title: Re: James Webb Space Telescope
Post by: Tank on November 15, 2023, 11:11:19 AM
Living on the edge of discovery!!!  :frolic:  :frolic:  :frolic:
Title: Re: James Webb Space Telescope
Post by: Icarus on November 16, 2023, 12:08:56 AM
^ That is mind bending stuff.