This should blow your mind...

[digitaldog]

How do you explain the color purple to a person who's been blind since birth?  Our senses were developed for use on Earth.  We can't easily comprehend mysteries beyond the capabilities of our senses.

"If you want a wise answer, ask a reasonable question." -Johann von Goethe
Not that you'd accept a reasonable answer.

As for the color purple, start here (try to get through part of the 3rd paragraph if possible: What is color?):
http://digitaldog.net/files/ColorNumbersColorGamut.pdf

[digitaldog]

How do you explain the color purple to a person who's been blind since birth? 

You have this odd repetitive habit of asking questions of others, when your posting history and agenda show/prove, you have no desire or ability to accept any answer. No need to ask.
How do so many here explain facts, data, science to a fellow who can't comprehend facts, data or science? Now that's a reasonable question you can't answer.🤫

You clearly don't belong posting in this thread, you didn't read the very first post here:

... If you have any interest in science, photography and imaging:

[TechTalk]

We can't easily comprehend mysteries beyond the capabilities of our senses.

That's what science does.

[digitaldog]

Keep fingers crossed, for at least 10 days:

Several steps remain in the telescope's deployment process in the coming days, including the deploying of the telescope's primary and secondary mirrors. That process will likely start in earnest this weekend, mission officials said, and should take about 10 days.

[Peter McLennan]

We can't easily comprehend mysteries beyond the capabilities of our senses.

I understand this, Alan. It's not necessary for you to state the obvious.

If you read my post you'll see that what I disagree with is the preposterous story they've invented to cover their lack of understanding of these "mysteries beyond the capabilities of our senses."

In other news, the secondary mirror has been successfully deployed and is now latched firmly in place.

So far, so good.

[digitaldog]

I understand this, Alan. It's not necessary for you to state the obvious.

It isn't necessary, but he can't help himself with this kind of posting agenda hobby of his.
He can't easily comprehend mysteries beyond the obvious. 

[kers]

The telescope now has reached its Lagrange L2 point in space and now cools down to -223K to begin ...

[Chris Kern]

LensAlign on an astronomical scale.

(Apologies to Michael Tapes, who makes the process somewhat easier for those of us fiddling with cameras down here on terra firma than for NASA operators manipulating remotely-operated equipment that is hovering around Lagrange Point 2.)

[Peter McLennan]

LensAlign on an astronomical scale.

(Apologies to Michael Tapes, who makes the process somewhat easier for those of us fiddling with cameras down here on terra firma than for NASA operators manipulating remotely-operated equipment that is hovering around Lagrange Point 2.)

Thanks, Chris.  An amazing story so far.

[digitaldog]

The people who should be apologizing to Michael are these guys:
https://www.datacolor.com/photography-design/product-overview/spyderlenscal/ 

[Chris Kern]

The people who should be apologizing to Michael are these guys:
https://www.datacolor.com/photography-design/product-overview/spyderlenscal/ 

Yikes!  That's really blatant.

[digitaldog]

Yikes!  That's really blatant.

Only one example. How about this (and X-rite):
https://www.datacolor.com/photography-design/product-overview/spyder-checkr-family/
Doesn't even make a real camera profile. An original idea, they haven't as yet developed....
But I have gone off-topic, sorry.

[digitaldog]

Back on topic:
https://www.cnn.com/2022/02/11/world/james-webb-space-telescope-selfie-images-scn/index.html

Webb telescope's first test images include an unexpected 'selfie'

[Chris Kern]

The effort to align the mirrors of the James Webb Space Telescope continues to make steady progress.

After moving what were 18 scattered dots of starlight into Webb’s signature hexagonal formation, the team refined each mirror segment’s image by making minor adjustments, while also changing the alignment of Webb’s secondary mirror. The completion of this process, known as Segment Alignment, was a key step prior to overlapping the light from all the mirrors so that they can work in unison.

The latest NASA weblog entry for the space telescope includes an animated GIF that illustrates this process:

Although Image Stacking put all the light from a star in one place on NIRCam’s detector, the mirror segments are still acting as 18 small telescopes rather than one big one. The segments now need to be lined up to each other with an accuracy smaller than the wavelength of the light.

[kers]

Good to see they did not make the metric-inch mistake as they did with the Hubble...

[NikoJorj]

Good to see they did not make the metric-inch mistake as they did with the Hubble...

Wasn't that a martian chronicle probe story?

Anyway, progress goes boink to quote Watterson :
https://www.nasa.gov/press-release/nasa-s-webb-reaches-alignment-milestone-optics-working-successfully

[digitaldog]

On Friday, NASA revealed in a post on the Webb Telescope’s blog that the operations team here on Earth is calling it a day as far as the sixth stage of Webb’s commissioning process goes. Now, they are ready to move on to the seventh and final step of getting the telescope ready for science — once the instruments cool to their operating temperatures, that is.