How James Webb's Mirrors MUST Work

[@LaunchPadAstronomy]

🔴How Webb's Deployments Worked! kzbin.info/www/bejne/h5bMgnh9aZpjncU

[@petergraumuller6590]

Hey there how are you?

[@Inertia888]

Would Hubble have a noticeable (valuable) advantage from its current position, if it were at L2?

[@chronosschiron]

wait isnt this the prototype death star weapon ...oh wait ... reality :)

[@BLAngel1]

What happens if one or more of the mirror segments fails. Say a motor goes out or is hit by a micro meteor.

[@b3at2]

Thanks for explaining the tech behind the scope.

[@johnannan2506]

I love that this channel doesn’t shy away from providing greater and greater detail and assumes that the viewers are plenty smart enough to understand. THANK YOU! There’s dozens of channels out there talking about JWST, but none of them are as comprehensive, thorough and non-patronising. I’ve got one question though; how do the mirror actuators make nanometre-scale adjustments at little above absolute zero?? That’s clearly no ordinary servo or stepper motor! 👍🏽

[@jamescollier3]

yeah. there's so many channels, videos and talks that cover the basics. Then we don't learn anything new. He did a great job

[@LaunchPadAstronomy]

Thank you so much 😊 My mind is blown by the actuators as well. That’s tech they had to invent but I’ll be damned if I know how they pulled it off!

[@stevewilson5546]

The drive motor is a stepper motor with 20 degrees per step. It drives a 60:1 reduction gear which drives a complex mechanism to adjust the mirror. There is an article titled "Cryogenic Nano-Actuator for JWST " by Robert M. Warden that describes this in detail. Well worth reading!

[@johnannan2506]

@@stevewilson5546 Thank you. I’ll make a point of reading it!

[@andromeda121]

agreed, this amount of technical details is amazing. You need a real astronomer/sceintist/engineer to really understand and convey these technical details, I think thats what is missing in other channels

[@hp127]

Very clear explanation of Webb's design, much appreciated. Thanks for your all videos.

[@LaunchPadAstronomy]

Thanks, I appreciate it. This was a tricky one to make!

[@oldmech619]

I was also impressed with the explanation. Just what I needed to know. Thanks. Ps, I did have to look up tertiary mirror.

[@darthvirgin7157]

as an engineer, i appreciate all the technical minutiae involved in the JWST’s design that you have been presenting. it’s easily on par with a typical presentation i would usually see in an engineering conference. my hats off, sir.

[@LaunchPadAstronomy]

Wow, I'm flattered! And I assure you, I'm not an engineer by any means :)

[@conanichigawa]

Your videos are simple, yet well explained.

[@LaunchPadAstronomy]

Thank you very much!

[@conanichigawa]

@@LaunchPadAstronomy yey! You replied! :D

[@EugeneSeidel]

So Beryllium is very stiff, yet can be bent into the desired shape by the actuators 🤔. Great video, top-notch audio, superb production values!

[@LaunchPadAstronomy]

Many, many thanks!

[@ekstrapolatoraproksymujacy412]

It is important to realize the scale of this "bending", single mirror has 1.4m diameter and it bends about 0.00000001m

[@DragonMoth34]

Nothing is being bent though? The mirrors keep their shape, but are tilted, not bent, in very miniscule amounts...

[@michaeldeierhoi4096]

@@DragonMoth34 That isn't the impression I got from this video. Each mirror is in fact bent very slightly in combination with the individual movement of each mirror along all 3 dimensions. That is why there are seven actuators on each of the 18 mirrors.

[@mikee5595]

Kings dethroned by Gerrard Hickson A History of the Evolution of Astronomy from the Time of the Roman Empire Up to the Present Day; Showing it to be an Amazing Series of Blunders Founded Upon an Error Made in the Second Century B.C.

[@kinesis28]

You're very interesting! That'll be a subscription. The more I learn about the JWST the more my admiration for the whole project increases. Such ingenuity at all stages, from inception to execution, it just blows my mind.

[@LaunchPadAstronomy]

Welcome aboard! I'm glad to have you along for the ride!

[@veramae4098]

Just watched Scott Manley's video on 10 hideous mistakes NASA (and other countries) has made. Lens caps feature often. JWST seems to prove they've solved their problems. Except for one small glitch at the start (solved by an already planned "work around") everything has worked perfectly. I especially liked the mistake where accelerometers were installed upside down. Despite direction arrows and deliberate sizing to make it "impossible" to install upside down, some worker found that with enough brute force he could make them fit. That way. Upside down.

[@kingd3444]

I literally love your content. I've never found another video explaining the system of mirrors and how they all work together. Its simply brilliant. Would love for you guys to do some content on how each of the science instruments work. Feed me more!

[@vegassims7]

WOW.. best video of information regarding the tech aspect of the JWST I have heard yet. Great job!

[@LaunchPadAstronomy]

Glad you enjoyed it!

[@magnusmaynard]

The complexity of this blows my mind 🤯 and we are barely scratching the surface!

[@jimaanders7527]

Thank you for the very detailed and very understandable talk about WST. It is fascinating to learn how the designers have considered such fine details. Those people did an incredible job! "It's all gotta be there to work."

[@LaunchPadAstronomy]

It's my pleasure, thanks! And yeah, it was a lot harder than it seemed it would be!

[@mikeandrade4114]

Even with applying lessons learned from every past aerospace or science project, it's amazing there's people who sit in rooms and just think all this up & figure it out

[@AnthonyThomas06]

This is the best explanation to all my curious questions about JWST. Well done Sir.

[@LaunchPadAstronomy]

Wow, thanks!

[@pauljmeyer1]

That precision is marvelous, it's a beautiful thing.

[@donaldhawkins5209]

Anyone who has an interest in this telescope should definitely watch this video it is by far the best out there I love the details you really showed the complication upon complication upon complication and really show how amazingly complicated and delicate this machine is

[@Entropy825]

Thank you for this beautifully produced video.

[@LaunchPadAstronomy]

I'm so glad you liked it!

[@erichaynes7502]

Thanks a billion for this Christian..you've really been killing it with these JWST videos lately. and yes, I'm really looking forward to your future video(s) on JWST's MIRI and other cool instruments!

[@LaunchPadAstronomy]

Thanks Eric!

[@MrsTitina]

There’s a lot of new patrons!!! Congrats! You sure deserve them!!!

[@Rafaga777]

Thanks a lot for this clear explanation. Much appreciated,

[@LaunchPadAstronomy]

Glad it was helpful!

[@cristianundurraga4583]

Definitely one of the most in depth, detailed and thorough videos I've seen about the this new telescope. Great job explaining all of this.

[@LaunchPadAstronomy]

Wow, thanks!

[@justexactlyperfectbrothersband]

Man am I glad I've lived through the end of the 20th and into the 21st century, I can't imagine there has ever been or ever will be a better time, Grateful Dead, (Pink Floyd as well you crazy diamond), and good old James Webb. Science has never been more exciting (or baffling to me), and thanks to it we have the universe to look at and wonderfully remastered live concerts to listen to.

[@NeilGastonguay]

Thank you for making these complicated concepts so understandable. This will be an amazing project, showing us the universe in ways that we never could have foreseen. I appreciate your explanations.

[@LaunchPadAstronomy]

You're very welcome!

[@trankzen148]

It's been a long time coming but so far Webb seems to be a grand slam home run for everyone involved. Incredible stuff

[@PedanticNo1]

I found your channel through the most recent L2 orbit video and I've got to say, this is some of the most in depth, entertaining coverage of JWST that I've seen. I hope your channel continues to grow, and that your passion for presentation doesn't fade!

[@LaunchPadAstronomy]

Wow, thanks!

[@Mosern1977]

Very nice info. Glad to see your channel is taking off, its well deserved!

[@LaunchPadAstronomy]

Thank you so much, it's much appreciated!

[@morningstar-th7gq]

Very nice explain 💗💞💕💖💓thank you so much for sharing this knowledge Sr 👍😊😊😊🌹🌹🌹

[@haftago2]

What an exciting time to be alive. So grateful to have you as a presenter of this telescope. I always look forward to your KZbin videos

[@TheSpiritoftheCocktail]

CHRISTIAN!!! Your explanation of the optics are awesome!!!! I guess I took for granted that the fine details of observation has to come from fine adjustment!!! Not like the old B&W tube T.V.'s, right!!!! CHEERS!!!!

[@LaunchPadAstronomy]

Thanks man!

[@tristanwegner]

This is some high quality explanation. I love that you go into more details than most pop coverage

[@JanPBtest]

I think the name of the original researcher who calculated explicit parameters for a three-mirror telescope in 1972 should be mentioned: _Dietrich Korsch_ who published his result in the paper titled "Closed Form Solution for Three-Mirror Telescopes, Corrected for Spherical Aberration, Coma, Astigmatism, and Field Curvature", in Applied Optics, vol 11, No. 12, pp. 2986-2987.

[@Arfshesaid457]

What a wonderful exposition of interesting details. Thanks.

[@jamesonfjord8666]

Ya man we love you! Factual, clear, in depth. Love it and yes to its own video! Length doesn't matter, I don't tire since you keep us attentive and the flow is perfect. Way to go!

[@LaunchPadAstronomy]

Thank you, I appreciate that!

[@ralphgriffin2785]

Easily the best video I've seen on JWST ever. Thank you so much!

[@mordypie]

this channel is criminally underrated

[@NeroWolf42]

i wanna buy a coffee for every one of the dudes and dudets working on Webb. They rock!

[@markosullivan6444]

Your coverage of Webb has been excellent.

[@LaunchPadAstronomy]

Thank you so much!

[@BloobleBonker]

Christian The graphics are just exceptionally clear. Now we know so much better thanks to your hard work. Superb! I just hope you can keep doing these fantastic videos.

[@LaunchPadAstronomy]

Thank you very much!

[@davidswift9120]

As armchair enthusiast, at the point of almost reaching mental saturation of all things Webb at the moment, this video really delves into fascinating details I'd never heard before about how this incredible machine works. Many thanks for this!

[@ThomasHaberkorn]

Hexagons are Bestagons

[@LaunchPadAstronomy]

I was so tempted to use that line but Grey beat me to it a long time ago :)

[@hls6925]

Really enjoyed your JWST vids from the outset - very meticulous, informative, and entertaining - thanks!

[@LaunchPadAstronomy]

Thanks, I'm really glad you like them!

[@bungietwab4868]

Imagine showing someone this video 200 years ago! My head is about to explode!

[@TheAstroG]

Thanks for providing great information to us!😀

[@A-Distant-Star]

The Force is with you! We will follow.

[@LaunchPadAstronomy]

I'm glad to have you along for the ride!

[@granand]

This is a lot better explained and detailed answering questions I didn't even have to ask, a lot better than NASA.

[@LaunchPadAstronomy]

Thank you!

[@Kakka666712]

Nice, clear and concise.Great detail without getting bogged down. Stay up there, my man.

[@EngRMP]

As a radar engineer, I can appreciate everything you discuss here. What a great job you do bringing this complex science to us in an engaging and understandable manner. You made it really fascinating.

[@atomsk01]

5:34 16 times the detail! 9:54 Why hexagons? Because they're the bestigons! Amazing video, though! Can't wait to understand the mysteries of the universe!

[@LaunchPadAstronomy]

Thanks so much!

[@lidarman2]

This answered a lot of questions deep in the weeds. Thank you.

[@SmallKatas]

I really appreciate your clear and thorough videos! I’ve always been curious about how the mirrors actually align, and learning about how scientists had to account for the cold contractions of different materials is really cool.

[@LaunchPadAstronomy]

Thanks for letting me know, I’m so glad you found it helpful!

[@A_Few_Thoughts]

That was an excellent video. The best I've seen. It explainded the the deployment of the mirror very well. It was specific but still understandable and not boring at all. That guy did a great job. It also had great images of that beautiful mirror!

[@tinetannies4637]

I enjoy your videos so much, your presentations are excellent

[@LaunchPadAstronomy]

Thank you very much!

[@mosshark]

That JSWT primary mirror pin is lovely. Great vid. 👍

[@LaunchPadAstronomy]

Thanks!

[@essentialvermeer]

Absolutely best! Keep us updated.

[@zaugitude]

The BEST explanation I have found! Answered the question I had and so much more. Thanks!

[@trufflehunter58]

As someone who's always been fascinated by astronomy and telescopes and also a teacher, I really admire your teaching skills. That rare ability to condense complex concepts down to digestible information. Thanks, Christian. One question that no one seems to bring up, though: what kind of diffraction spikes would the secondary support struts on the JWST create? They certainly wouldn't be the typical 6 spike pattern. More like those of a Bahtinov mask?

[@LaunchPadAstronomy]

Really appreciate the kind words, thank you! Webb's diffraction spikes will be 6 pointed so yes, much like a Bahtinov diffraction pattern.

[@ScullyPop]

This is such a wonderful episode.

[@LaunchPadAstronomy]

Thanks Scully!

[@Anuhea_Silverheart]

That was very good explained with the James Webb Space Telescop, quite knowledgeable answers you gave! I hope everything it will be alright with it's traveling to L2 point, and take stunning space photos!🤩

[@discoverlight]

Always accurate and easy to understand even tho I am not an expert on any these fields, just an enthusiast. Thanks and I hope you keep us posted on this amazing piece of human work of art and engineering.

[@LaunchPadAstronomy]

Very kind of you to say. Thank you!

[@smart_ape]

I'm totally and utterly mind boggled by the complexity and ingenuity with which the real life problems that JW will face have been thoroughly taken into account and tackled... Good job team and thank YOU so much for helping me understand a bit more about the subject. I was already so excited a few years back when I found out about the project, now I'm even more so ! Keep up the good work !

[@bravo-93]

4:59 A very interesting analogy

[@djdrake1163]

Hexagons are one of the greatest shapes. It has a great stability as seen in beehives. Great Video. You make this really understandable and enjoyoable. I hope this channel continues its great work. Keep up the good work. Greeting from germany. ^^

[@Space_Rebel]

This is great. We’re all excited. A very good presentation. Many thanks.

[@LaunchPadAstronomy]

Thanks, I'm glad you enjoyed it!

[@zakelwe]

I love the way you say all that info in so much detail but then mention the cools kids on the TMA XYZ and then put your left eyebrow up. Science should be accurate, in depth and fun for the layman. You knock those 3 out of the park !

[@CxC2007]

Just discovered this channel. It's great. Finally a channel with more advanced explanations.

[@Nah9_77]

Great job I am very impressed with the detail in the video. Learned a lot about the telescope and I am excited about the future of this project

[@dwayneduval6785]

Another great documentary about my favorite new thing!

[@LaunchPadAstronomy]

LOL, thanks!

[@Dan5482]

"Crazy diamond"... Nice reference to Syd Barrett. I feel like listening to 'Astronomy Domine' now.

[@dkernsy6932]

Nice Deadhead "Steal Your Face" logo, too.

[@zk3128]

I have never seen best explanation than this ever till now..👏👏👏👏👌❣️

[@techdefined9420]

Very interesting insight details, subscribed!

[@LaunchPadAstronomy]

Awesome, thank you!

[@mr.reigns4794]

Well explained thanks for the vid! Keep them coming 👍

[@korbendallas3128]

Really great video!! Much love from England xx

[@joedasilva134]

Thanks Christian. Your videos r amazing . I am so excited n can hardly wait to see the first pictures. You rock !

[@LaunchPadAstronomy]

Thanks Joe!

[@JeffNolan]

the mirrors are polished to their almost final shape and sent to another facility where they are placed in a cryogenic chamber and cooled to their operating temperature. Changes in shape are precisely measured and sent back to Richmond where they are final polished to their prescription taking into account the measurements recorded in the cryogenic chamber. Small detail but an important step to ensure the mirrors work as intended. The 18 segments are divided into groups with 3 unique optical prescriptions. The mirrors are not all alike.

[@rodneydowd4739]

Love the energy and always my favourite topic!

[@soundped]

Great video. Really appreciate the details. Cheers

[@TheMadrashowdy]

Thank you. This video was informative.

[@CIMiclette]

Awesome channel, clear and concise in-depth presentation. Looking forward to more videos and to binging all the ones already out!

[@Justwantahover]

8:40 That seems obviously why beryllium is used for tweeters. Less ringing.

[@spwolfbrandt]

I still can’t believe that this telescope is working ! It’s wonderful !

[@dexio85]

Great and detailed explanation without dumbing it down to much. Thank you very much!

[@LaunchPadAstronomy]

Glad it was helpful!

[@bastianrivero]

Incredible what has been achieved so far

[@davebowles1957]

Thank you for the comprehensive explanation of this wonderful and fascinating work of extraordinary marvel of modern technology. I had a good idea but this really brought it together for me so, thank you again. I'll be subscribing right after I write this

[@abseiduk]

Excellent presentation, great visuals.

[@LaunchPadAstronomy]

Many thanks!

[@domenicm1555]

Found this Chanel today and subscribed today!! So much fun and so intriguing to learn more about! Thank you guys!

[@darylmorse]

Thank you for an interesting video. Please keep diving deeper into the details!

[@LaunchPadAstronomy]

Thank you! Will do!

[@ZameerHJ]

I’m super excited to see what the JWT uncovers. So much new science and knowledge about our universe. Knowing the atmosphere of other planets is exciting. Knowing if an alien world has an atmosphere like Earth’s.

[@tomschmidt381]

Great deep dive into the optical path/components of JWST.

[@ricksanchez9232]

Great explanation of the functioning of the JWST, look forward to seeing the images.

[@SinskariBoi3366three]

Crystal clear explanation

[@T8619-o8z]

Please explain how the light gets to each instrument and if they see the same object at the same time. Thanks

[@TeamCGS2005]

Incredible video. Makes understanding this technological marvel, easier.

[@ezekielmajor5511]

The way you relay this information, one would think you know a lot about physics 🙂

[@LaunchPadAstronomy]

I dabble 🙂

[@Justwantahover]

At last a decent technical documentary on how the JWT works.

[@pixelsmart]

I just discovered your web page. I am very very impressed with the quality of your videos.

[@sirannikus]

Can't wait for the first picture!

[@patrickwalsh2361]

Thanks Christian for another very informative video! I always get more from your channel - keep them coming!

[@LaunchPadAstronomy]

Thanks!

[@rubikscubeearf6218]

Thank you for this video. Really great info.

[@zasanafesenov8119]

Just wanted to say great work on this video, and that gold pin on your shirt is rocking it too.

[@profesor5150]

Beautiful explanation and easy to understand. Even my 12 old kid understood what you were explaining. The only question we have and actually my kid brought it up. How come the movements are so slow when adjusting the mirrors? Maybe one day you'll see our comment and question about the mirrors adjustments and could answer so I can explain it to my kid and for my own curiosity as well. Or if any one reads this, would much appreciate it. Thanks.

[@LaunchPadAstronomy]

I’m so happy you both enjoyed the video! As to the slow rate or the mirrors, my understanding is that it’s for two reasons. First, the faster they turn, the hotter the motors get. That means more heat is conducted into the Moro which they don’t want to happen. The second reason is that the slower they turn, the easier it is to stop if something goes wrong. Then they could reverse and try again without much risk of damage. There’s probably several other advantages to going slow, but those are two that I’m aware of.

[@conanthedestroyer7123]

I like your nerd shirt. I give it 5 gold stars for nerdiness.