How James Webb's Mirrors MUST Work
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- čas přidán 2. 06. 2024
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Getting JWST's complex optical system to work is critical. But is Webb really more powerful than Hubble? And why does Webb use hexagons? Why are there black borders around the mirrors? How do the mirrors survive the cold? And why are JWST's mirrors gold?
00:00 Webb's Optical System
03:30 Magellan TV
04:15 Webb vs. Hubble's Resolution
06:40 How Webb Avoids Stray Light
07:34 Golden Beryllium Mirrors
09:52 Why Hexagons?
10:40 How Webb Avoids Hubble's Mistake
11:47 Mirror Deployment, Alignment, and Phasing
14:32 Instrument Phasing and Calibration
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🔴How Webb's Deployments Worked! czcams.com/video/QeiQEG450gc/video.html
Hey there how are you?
Would Hubble have a noticeable (valuable) advantage from its current position, if it were at L2?
wait isnt this the prototype death star weapon ...oh wait ... reality :)
What happens if one or more of the mirror segments fails. Say a motor goes out or is hit by a micro meteor.
Thanks for explaining the tech behind the scope.
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! 👍🏽
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
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!
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!
@@stevewilson5546 Thank you. I’ll make a point of reading it!
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
Very clear explanation of Webb's design, much appreciated. Thanks for your all videos.
Thanks, I appreciate it. This was a tricky one to make!
I was also impressed with the explanation. Just what I needed to know. Thanks. Ps, I did have to look up tertiary mirror.
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.
Wow, I'm flattered! And I assure you, I'm not an engineer by any means :)
Amazed that they even will be able to adjust the curvature of each individual mirror. Biggest fear was that no matter how movable the mirrors were, bad curvature would still mess things up like it did for the hubble. Now I feel even more confidence in the JWST.
Fortunately for Hubble the curvature error was so exactly wrong it could be exactly fixed. But that curvature error was incredibly small, half a wavelength of light. Can you believe it turned out to be so big?
So Beryllium is very stiff, yet can be bent into the desired shape by the actuators 🤔. Great video, top-notch audio, superb production values!
Many, many thanks!
It is important to realize the scale of this "bending", single mirror has 1.4m diameter and it bends about 0.00000001m
Nothing is being bent though? The mirrors keep their shape, but are tilted, not bent, in very miniscule amounts...
@@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.
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.
Your videos are simple, yet well explained.
Thank you very much!
@@LaunchPadAstronomy yey! You replied! :D
Dude that eyebrow after "a tma optical design..." really got me.
Excellent presentation of the whole process of positioning and aligning the mirror segments. Answered all my questions.
Thanks Geoff!
Me too! I totally agree.
I watch a lot of astronomy-related youtube content. The youtube algorithm has obviously failed me for many years... but finally it listed this channel. Fills a nice niche that was missing, I love learning about space missions that are less well known about, the GAIA space telescope video was incredibly interesting for instance. The webb stuff is great too but I'm finding myself looking back through your videos to find cool stuff I missed over the years.
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.
Welcome aboard! I'm glad to have you along for the ride!
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.
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.
Very kind of you to say. Thank you!
Well done. So refreshing to get some details on the more technical side. Please continue to go as in depth as you can, as that is what sets your channel apart!
Your videos are the best, i really like that you explain everything in detail and not just scratch on the surface like many other space channels!
Nice, clear and concise.Great detail without getting bogged down.
Stay up there, my man.
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!
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!!!!
Thanks man!
Awesome channel, clear and concise in-depth presentation. Looking forward to more videos and to binging all the ones already out!
What a wonderful exposition of interesting details. Thanks.
Absolutely best! Keep us updated.
This is some high quality explanation. I love that you go into more details than most pop coverage
WOW.. best video of information regarding the tech aspect of the JWST I have heard yet. Great job!
Glad you enjoyed it!
The BEST explanation I have found! Answered the question I had and so much more. Thanks!
Awesome information! as clear and understandable as possible. keep it up man!
Appreciate it!
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."
It's my pleasure, thanks! And yeah, it was a lot harder than it seemed it would be!
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!
Thank you, I appreciate that!
Thanks for providing great information to us!😀
Very nice info. Glad to see your channel is taking off, its well deserved!
Thank you so much, it's much appreciated!
Amazing video I really love how detailed all the info is. Thank you so much!
Well explained thanks for the vid! Keep them coming 👍
That was an excellent presentation. I learned a lot from it. Thank you.
Your videos have given me everything I need to know and more about this project and I can’t be more grateful! Thank you so much for your contribution, Christian!
My pleasure, and thanks!
Great video. Really appreciate the details. Cheers
What an exciting time to be alive. So grateful to have you as a presenter of this telescope. I always look forward to your CZcams videos
Thank you for this beautifully produced video.
I'm so glad you liked it!
Thanks a lot for this clear explanation. Much appreciated,
Glad it was helpful!
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!
Thanks Eric!
Great video. Thanks for all your work.
My pleasure!
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!
There used to be jokes on when Webb would ever launch. But seriously, every single thing had to be worked out and absolutely nothing could fail. It's totally worth it.
Amazingly detailed video. Much love to you.
Thanks Christian. Your videos r amazing . I am so excited n can hardly wait to see the first pictures.
You rock !
Thanks Joe!
Really enjoyed your JWST vids from the outset - very meticulous, informative, and entertaining - thanks!
Thanks, I'm really glad you like them!
Thank you. This video was informative.
Thank you for this video. Really great info.
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!🤩
I’ve seen dozens. This is the best description of Webb so far and by far on CZcams for non-professionals.
There’s a lot of new patrons!!! Congrats! You sure deserve them!!!
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.
You're very welcome!
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
Very nice explain 💗💞💕💖💓thank you so much for sharing this knowledge Sr 👍😊😊😊🌹🌹🌹
Loved the detail in this video. So interesting.
Thanks Christian for another very informative video! I always get more from your channel - keep them coming!
Thanks!
Love the energy and always my favourite topic!
This is great. We’re all excited. A very good presentation. Many thanks.
Thanks, I'm glad you enjoyed it!
Easily the best video I've seen on JWST ever. Thank you so much!
Very interesting insight details, subscribed!
Awesome, thank you!
Thank you for an interesting video. Please keep diving deeper into the details!
Thank you! Will do!
This is the best explanation to all my curious questions about JWST. Well done Sir.
Wow, thanks!
Thank you, excellent presentation!
This information greatly adds to my excited enjoyment of JWST.
Really great video!!
Much love from England xx
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. ^^
This is the most advanced description of the James Webb Telescope I've heard so far
Great video. Very informative.
Great deep dive into the optical path/components of JWST.
I will never forget the shock of learning about the fault with Hubble just weeks after it was deployed, and NASAs unbelievable effort to remedy the problem, one of those miracles of science and human intelligence, like rebooting New Horizons hours before its Pluto flyby, or saving the Apollo 13 mission. Nevertheless, I am quite confident the JWST will never have such issues, and as of April or May, the world will be awed by the arrival of spectacular images, and they will keep coming, and coming for many years, Amen.
That precision is marvelous, it's a beautiful thing.
This was so informative! Thank you.
Great and detailed explanation without dumbing it down to much. Thank you very much!
Glad it was helpful!
Great presentation!
tyhis was. extraordinarily informative
You and Astrum are the best space channels on YT. Keep it up!
I enjoy your videos so much, your presentations are excellent
Thank you very much!
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!
Wow, thanks!
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.
Wow, thanks!
Great explanation , well worth the time.
I love this class and the professor! Laymans terms like a genius. Can’t wait for the next lesson.
Best explanation about everything JWST in under 20 minutes. A must share video.
Wow, thank you!
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
The telescope is ridiculously awesome! I am thrilled it deployed perfectly, and mind-boggled at the skill and brilliance that afforded its construction. I am so excited to see the data return from it! AMAZING!
You and me both!
Appreciate how well you explain and how well your videos are put together. Keep up the great work 👍 my favorite astronomy channel .
Wow, thanks Dale!
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.
Thanks for letting me know, I’m so glad you found it helpful!
Excelentes explicações, imagens e detalhes. Há detalhes em toda parte nesse maravilhoso telescópio. Tudo meticulosamente bem estudado. A escolha da película em ouro, coincidentemente, valorizou ainda mais como uma obra de Arte.
E isto é só o começo.
thanks for posting !! ! !!
This is such a wonderful episode.
Thanks Scully!
Great breakdown thanks
Great video, only came across your channel recently but have loved all of the different videos on telescopes (including the earth based ones!)
Welcome aboard! And I actually talk about things other than telescopes on this channel, but I like big scopes and I cannot lie :)
Great and informative talk, Thanks! 🍺🤙
Glad you enjoyed it!
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.
Thank you very much!
Thank you once again for bringing us yet another amazing video, explaining clearly the finer engineering and science details of this instrument.
There are a lot of 'layman' explanation vids out there, which is brilliant but I find are too basic. Your videos are perfect for those of us who have a hunger to go deeper, without drowning out of our depth.
Thank you so much ❤️
My pleasure!
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.
Excellent presentation, great visuals.
Many thanks!
It's been a long time coming but so far Webb seems to be a grand slam home run for everyone involved. Incredible stuff
The amount of testing is staggering, but well worth it! Great job!
It really is!
He makes it easy to understand.
This is the most descriptive james webb video I’ve found so far!
Thank you!
Awesome video!
The complexity of this blows my mind 🤯 and we are barely scratching the surface!
nice job - thank you
Once again, perfect explanation 😌
Thank you so much 😀
Nice vid professor