James Webb telescope launch info

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Re: James Webb telescope launch info

#81  Postby Cito di Pense » Jan 21, 2022 9:02 pm

hackenslash wrote:
He also laid the foundations for bovine orbital mechanics


So, that was the herd shot 'round the world.
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Re: James Webb telescope launch info

#82  Postby hackenslash » Jan 21, 2022 9:43 pm

It was exactly what gave Douglas Adams the idea for the story arc involving the cow's evolutionary cousin and the oft-cited floral arrangement that found a latter home in a certain member's regular output over the years...
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Re: James Webb telescope launch info

#83  Postby The_Piper » Jan 22, 2022 5:24 pm

:lol: :lol: :picard:
I wonder if there's correlation between cow dung tossing and vaccine-shunning. The James Webb Telescope can't start producing data fast enough for this thread. :mrgreen:
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Re: James Webb telescope launch info

#84  Postby The_Metatron » Jan 24, 2022 11:07 pm

Looks like it’s on station al Sol-Earth L2! We didn’t shoot the damned thing off into outer space!

https://webb.nasa.gov/content/webbLaunc ... its=metric
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Re: James Webb telescope launch info

#85  Postby Cito di Pense » Jan 25, 2022 8:24 am

So, how fast (relative to earth's center of mass, I guess) was the telescope traveling when it entered the halo orbit? It turns out that it was about 200 meters per second, about the speed of a commercial airliner at economy cruise. The delta-v for the course correction was on the order of a meter per second or two.

Going with the bovine trending, let's term the station-keeping as a "cows célèbre". I am udderly pleased.
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Re: James Webb telescope launch info

#87  Postby newolder » Feb 01, 2022 9:15 am

What will JWST see first?

Wiki:
HD 84406, is a star approximately 241 light-years away in the constellation of Ursa Major. The star is a spectral type G star and has a high proper motion. HD 84406 is the first star to be imaged by the James Webb Space Telescope.


In order to align its 18 mirrors, small adjustments to each segment will bring the 18 images of this star to sharp focus in the coming months as the instruments continue cooling to operating temperature...
... The cryocooler will cool MIRI to 6 kelvins in the following months.

NASA blog link
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Re: James Webb telescope launch info

#88  Postby newolder » Feb 11, 2022 6:17 pm

First lights are in! The 18 images of the star (above) will be aligned gradually over the coming months. They cover an area smaller than the design anticipated and all is going better than expected so far...
Image
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Re: James Webb telescope launch info

#89  Postby Macdoc » Feb 13, 2022 10:08 am

Image

'Holy cow!' How the James Webb Space Telescope took a selfie in space
By Elizabeth Howell published 1 day ago

A special lens shows the telescope getting ready for work in the coming months.

more
https://www.space.com/webb-telescope-sp ... fie-nircam
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Re: James Webb telescope launch info

#90  Postby newolder » Feb 18, 2022 9:38 pm

Alignment progress update image:
Image

NASA blogpost link
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Re: James Webb telescope launch info

#91  Postby hackenslash » Feb 18, 2022 9:52 pm

That's really cool. Exciting times.
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Re: James Webb telescope launch info

#92  Postby newolder » Feb 25, 2022 4:30 pm

Further reported progress:

First, the individual segment focus improves -

Image

Next, the image stacking begins -

Image

During this phase of alignment known as Image Stacking, individual segment images are moved so they fall precisely at the center of the field to produce one unified image instead of 18. In this image, all 18 segments are on top of each other. After future alignment steps, the image will be even sharper. Credit: NASA/STScI


NASA blogpost link
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Re: James Webb telescope launch info

#93  Postby newolder » Mar 16, 2022 4:05 pm

Alignment enters "fine phasing" stage and things are going as well as can be expected...
Image
Webb reaches alignment milestone
16/03/2022

ESA / Science & Exploration / Space Science / Webb
Following the completion of critical mirror alignment steps, the NASA/ESA/CSA 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.

continues @ ESA link


Same star (not the same field of view though) in the Digitized Sky Survey - via @drbecky_
Image

Near Infrared (NIRCAM) alignment selfie - all mirrors reflecting light from that same star:
Image
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Re: James Webb telescope launch info

#94  Postby hackenslash » Mar 16, 2022 9:50 pm

Starting to get goosebumps.
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Re: James Webb telescope launch info

#95  Postby newolder » Mar 16, 2022 10:23 pm

The galaxy just below 10 o'clock is the only one catalogued with a red shift (all the other smudges are galaxies too) and that puts it about 4.3 billion light years distant. And there are months of tweaking to go yet...

drbecky_'s tube:

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Re: James Webb telescope launch info

#96  Postby hackenslash » Mar 17, 2022 6:52 pm

Shocking new image...

Image
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Re: James Webb telescope launch info

#97  Postby newolder » Mar 17, 2022 7:20 pm

:rofl:
FTL and are they being pursued by the Borg? 2022 getting all 2020 too, eh?
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Re: James Webb telescope launch info

#98  Postby hackenslash » Mar 17, 2022 7:25 pm

No, they're being pursued by David McCulloch.
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Re: James Webb telescope launch info

#99  Postby The_Piper » Mar 18, 2022 12:13 am

:eager: This is gunna be cool. :eager:
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Re: James Webb telescope launch info

#100  Postby newolder » Apr 01, 2022 5:48 pm

James Webb Space Telescope completes another stage of instrument alignment
By Elizabeth Howell published 7 minutes ago

There's only one step left to tackle.

The commissioning stages of the James Webb Space Telescope just ticked off yet another phase.

Engineers have successfully aligned all but one of the instruments on the $10 billion space telescope for the first time, NASA reported on Friday (April 1) as Webb continues to cool to deep-space temperatures after launching Dec. 25, 2021.

The interim instrument adjustment was so successful that engineers determined they don't need to realign the secondary mirror of Webb, which was an option if they determined anything was out of line. One last phase of "multi-instrument alignment," as NASA terms the process, will place after the telescope's final instrument cools. The cooling milestone should happen in the "weeks ahead," the agency stated.

...

More @ space.com link
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