How Webb Formed a Perfect Mirror
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- เผยแพร่เมื่อ 16 พ.ค. 2024
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Webb formed a perfect mirror out of its 18 segments and created the sharpest infrared image of a star ever made with a single telescope. We explain how the image and its selfies were made and what is next for the James Webb Space Telescope.
00:00 Intro
01:15 Diffraction Spikes Explained
03:59 First Star Images
05:04 First Selfie Image
05:58 Segment Identification and Global Alignment
06:55 Image Stacking
08:01 Coarse Phasing
10:20 Fine Phasing
11:30 Multi Instrument Multi Field Alignment
13:06 Maintaining Alignment
13:53 Skillshare
14:42 Thanks and Welcome New Patrons
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🔴 Learn how Webb's instruments work, and what they'll show us: th-cam.com/video/MzWfUK0yvdY/w-d-xo.html
I believe that this telescope is very accurate but the spikes obscure the images of planets circling the star
So WHY do we absolutely have to accept those "refraction spikes" ? Im a photographer myself and Im well used to seeing them in photos. But what are they actually.
Even the ‘official’ videos didn’t go into this level of detail.
Thanks for keeping us all informed about this amazing instrument.
We are truly entering into a new age of astronomy.
I have worked with "pretty accurate" machines and electronics my whole life and career. I guess I really didn't have the range on "really, really accurate" until I started reading about telescopes' optics, (earth bound and space bound). Then there's aiming and tracking. The physical and optical accuracy telescopes are built to and can achieve are barely imaginable.
Large machines, some parts with nanometer accuracy is astounding. Planned, designed and built by teams of brilliant people. Then managed and operated by teams of brilliant people. I'm just amazed.
The hardware is designed and made by engineers. The observations are made and analysed by astrophysicists. However, it is the people who determine how to orbit a point in space, tune up the hardware and schedule the program to maximise the 'information per observation' who count as "rocket scientists" in my book. That said - there are about 150000 people on the planet who should be feeling pretty proud at the moment.
Seriously. I work with radar and have to do phase alignments by hand-trimming coax cable to within a few tenths of an inch, for frequencies with wavelengths a couple 100,000x longer than the light they're aligning MIRRORS for, from a million miles away. I just can't comprehend that.
Wait until you hear about photolithography!
Thank you for keeping us up-to-date on JWST. I like watching these explanations then telling my friends about how mind-blowing this telescope is. Can’t wait for the images we’ll get this summer!
Thanks, and yes it is pretty mind-blowing!
Same!
Wow... while I already knew the struts were somehow involved in the creation of those spikes in the resulting image, I'd never seen such an intuitive illustration of _how_ that worked! This made it so much easier to understand, particularly when you provide such a comprehensive explanation (even including the extra strut offset at the bottom). I'll definitely be sharing this the next time this topic comes up.
p.s. I know I'm just gushing with positivity here, but I can't leave without the obligatory "I'm so stoked to see JWST's first scientific images" 😄 Even the initial _test_ images are incredibly fascinating.
Glad you liked the video and I'm looking forward to science as well!
Thats not the full explanation for the diffraction spikes. You have also to consider the hexagonal shape of the mirror
@@b.s.7693 IIRC, he covers that in the video.
Best explanation ever - not just repeating what NASA published! Thanks!
Thank you so much! Repeating a press release is the last thing I want to do :)
@@LaunchPadAstronomy By the way: Yesterday I took my small little 6 inch telescope out and pointed it at the „leo triplet“ and got some nice shots of these beautiful galaxies. For me this alone is extremely amazing being able to make something this far away visible with just a beginners telescope and my daily used DSLR mounted behind it! How must it be for all these people working on JWST! They went „all in“ on this! By the way: Does that „light bending thing“ explain how my Bhatinov-masc helps me to focus? Greetings from Switzerland in the center of europe.
Observing the largest of structures now requires us to make nanometer adjustments to a mirror 1.5 million kilometers away. What a time to be alive. Great video as usual. ❤️
Thanks. This was the first video that explained the alignment process beyond the first few steps. Fascinating topic and engineering. I was super excited when I saw the detail on those background galaxies. Can't wait to see what we find out there.
this just shows how much testing they did it prove it will work the first time. wow
Forget the timing glitch. Your energy is appreciated.
The skill and creativity that went into creating the JWST is nothing short of astounding!
Honestly, this is one of the best Astronomy Channels on TH-cam. Thank you for your in-depth coverage.
Wow, thank you!
I absolutely loved the level of detail you went to in the alignment process! The sophistication of it all is incredible.
Even you said this is a simplified version of how JWST mirror alignment process works, it's still blowing my mind on how complex it is. I just can't wrap my brain around the part when you start mentioning the course and fine phasing. That's just ridiculous technology i can't even think about.
Oh btw, that transition to ad is so smooth i never see it coming.
I love the depth of this video about how Webb does everything! Thanks for sharing!
Thank you... This was the best and most in-depth description of the alignment process I've seen yet.
Thank you for explaining the streaks coming off the stars!!
The thing I’m excited about is that I remember hearing it would take 6 months to adjust the mirrors alone. It’s been 3-4 months since launch and they’re ALREADY aligned. It seems that the engineers gave a conservative estimation, which I’m grateful for because anything done quicker than intended means more fuel for science!!
They saved the best possible amount of fuel they didn't even hope for during the Earth orbital insertion, so precise it was. If you watched the launch, it was unusual how often did they read the planned trajectory deviation, and you could feel tension in the air. The computed planned trajectory itself was unusual, it had an altitude dip-I have no idea why did they do that. They had extra spare fuel capacity in the launch vehicle for the mission, so I'm guessing that they traded efficiency for precision with this unusual launch trajectory. The Ariane folks know their rocket so intimately, and many kudos go to to them for prolonging sciencing lifetime of the telescope by many months!
No, the schedule was always that it would take 6 months to commission the telescope, with mirror alignment being finished after about 3 months. So they're on schedule. Next comes 3 months of instrument calibration.
Breathtakingly complex machine.
Amazing how they adjusted it to such precision remotely.
Detailed explanation and on such recent topic
Great explanation of the phasing, helped me better understand how it was done. The public APT file of the fine phasing is fun to check out, has all the info about the exposure and integration times and such.
Please stop calling me
Thanks for going into such detail!!! Great video
Thank you so much for taking time to explain with such detail in such a small time !! First time I came to know about the spikes in the image !!
Thank you for the smooth explanation
Cheers mate. Great explaination
Thank you for the extraordinary information! Excellent video!
thank you for all the effort and video explanation.... learned a lot
Videos like these help appreciate JWST even more! Thank you!
I was waiting for this video! Thank you for covering the topic!!!
Thanks, I'm glad it helped!
As always profund explanations in a calm yet passionate manner … thank you
just outstanding and award wining explanation in simplest way. God bless you Sir.
As always - beautiful video.
This is an amazing video - so much information! Thanks for your hard work
I knew that the mirror positioning had to be precise, but I hadn't yet realised that they had to be aligned on the order of the wavelength of the light! That's nuts!
Well done to the team currently working on Webb!
Agreed!
The JWST has restored my sense of amazement. It almost seems magical.
“aligned on the order of the wavelength of the light”-I reckon, one hundredths of that, in fact, if not better! Visible light is ≈300 to 700nm, and infrared is even a longer wavelength.
Lovely episode!
Thanks
This is something unbelievable. Thanks a lot.
I'll listen now and will watch later. Excited.
Great video about James😍 so much I didn't knew
Christian, the depth and breadth of information you have provided in this and in your other videos staggers me. Thank you and keep up the great work!
Very well explained. Subscribed.
Thank you very much for the explanation.
I may not have understood a single thing said during this video, but I did learn a little and that means a lot to me. Keep up the great work.
My go to source for WEBB updates, thanks brother
Brilliantly explained ! can´t wait for the first images !!!!!
Brillant presentation! 👍🏼
Love your stuff! Thanks!
Well explained.👏
Excellent content! Keep them coming with even more details!!
This was really informative 👍🏼
The level of detail you go into is breathtaking and very interesting - shows how clever the engineers are and the public take it for granted.
Wow, this was mind-blowing.
Great video and explanation .
I have not a single bit a background in any of the complex fields of knowledge that come together to create this, yet I am able to follow your explanation front to back. That is an amazing capacity in explanation and understanding what you are talking about. Chapeau!
nice video! thank you for the information
Thanks for this clear, concise explanation. This is some fascinating stuff.
I watch so many videos about these topics but I'm always most curious about your insights! Great research and presentation to bring all us hobby astronomists a bit closer to the universe. Thanks for all your work!
Thank you for your passion to present astronomy topics like you do
Thank you. I am relying on your updates to keep me informed. Magic stuff.Keep it up.
Really good, thank you
I was waiting for your video about this! My favourite astronomy channel. Thank you for the continued easy to understand explanations.
You're very welcome!
Grinned at the smooth handover to the sponsor segment.
Thank you for doing these videos! I don’t personally know anyone who is interested in the things you discuss in these videos(I wish I did) but it makes me feel better knowing there is actually a huge crowd who is also so intrigued! Again thank you for all your hard work!
love these videos! please keep us updated with all jwst news
Thanks Eric, cheers!
You Are a real STAR!! Easy to understand not overcomplicated. Keep up the great work... Cousin
Thanks Cousin!
Excellent overview! It’s hard to imagine how precise the JWST is as it orbits L2.
amazing vid i love your explanations soo much
Thank you!
Excellent job explaining. Really the best information on YT.
Perfect image... right you mean that image with the 6 rays coming out the side. What a joke. These people are so dumb.
What a fantastic explanation of the focusing process of JWST, thank you so much I really learned! this is imo one of if not the best astronomy/astrophysics channel on youtube thank you for all you do
Thank you so much!
Thanks for the absolutely stellar explanation of the JWST operation! Great video, data, and presentation.
I can't wait to see more!
Finaly a new update!
I am so happy : ) What an achievement. Just brilliant.
Absolutely no one could have explained this better to me than you sir.
Thank you very much!
Thanks Guy, and I'm glad you found it helpful!
Thank you sir, you bring the information on the level I crave for. Thank you for sharing.
This is even more amazing that i thought
I love your works and thank you for everything you do.
Thank you, I really appreciate it!
Thanks for this interesting video.
These videos are awesome! :-) I pretty knew a lot already, but all the background information and the extra footage makes this a gem ;-)
Awesome, thank you!
Yes, very interesting and easy to grasp... thank you for the explanation! The JWST is truly exciting science!
What an exciting time for astronomy!
Hands down the best astronomy channel on TH-cam!! Thank you for well delivered and detailed explanation
Wow, thanks!
Thank you... Great sharing 🙏🙏🙏🌎
Thanks, I’m glad you liked it!
This summer is gonnna be OUT OF THIS GALAXY!!! Can't wait for all the instruments to be usable!!
This is so great that from my amateur view it seems everything is working perfectly with no heat or cold damage or damage in transport. This whole venture is really blessed. Amazing to think from so far away making adjustments down to nanometers. I surmise that once they get through MIF they will really know that all systems are go, but all such great news, human history for all times being made!
Absolutely Stunning.
A Great Thank You, sir.
You have a very Appreciative Audience.
Thank you, and I’m very grateful for your attention.
Superb explanation! Best astronomy channel on TH-cam.
Great quality videos on this channel. And I learn something new every time.
ps. I like how you're just calling it the Webb Telescope now. The full name is too clunky.
Incredibly detailed video! Thanks for this
Glad you enjoyed it!
Missed your updates on web for all these days, finally happy to see one
Thanks. Sorry for the delay, I had to remake this video after NASA punked me :)
That pin on your shirt is so dope!
I can't even understand a lot of this but your videos are really engaging. Love watching
Thanks again Christian for your in depth and reliable presentation. 👍❤
Appreciate it, thanks!
Brilliant, concise, clear, and informative as usual. Thanks ❤️❤️🇦🇺🇺🇦
I have seen so many different videos about the JWST. They all rehash the same info, except your videos. It’s amazing how well you explain the post launch commissioning process for JWST. I’m blown away with every video you do.
So often I am embarrassed to be a member of the human species but it's things like this that remind me I should be proud.
You are such a treasure. I can't fathom, that I am watching this for free. Thank you SO MUCH!
How do you know all this stuff?
You are very kind, thank you. As to how I know, I really don’t until I start obsessively researching it :)
Dude you're the best
thanks Christian, this is manna for us nerdy types who like details. :)
Best video on JWST thus far that I’ve seen.
Thank you very much!
When you explain things it usually takes a minute or so before my eyes glaze over and I begin to 🤤 drool. I don't get it all but you make it at least somewhat understandable at least for me. Not to mention your kinda funny. I can't wait for the full miracle of WEB to show itself and take us on a journey through the universe. You keep doing what you do and I'll keep coming my friend.
Simplest answer ever....
"Because physics"
Mornin', professor! Been waiting for this one, watching now :)
Hope you enjoyed it!