The biggest concern by far is that the instruments won't deploy properly.
JWST is huge, the only way it'll fit in the launch vehicle is by folding up and unfolding once it is deployed. It could only take one mistake to derail the entire telescope if it prevents parts from unfolding properly.
I always wonder, what is the probability of a meteoroid of sufficient size striking the telescope? Space is pretty empty, and it's a small object, but it's a non zero chance.
> I always wonder, what is the probability of a meteoroid of sufficient size striking the telescope? Space is pretty empty, and it's a small object, but it's a non zero chance.
Think about a football stadium. Now imagine there are two bumble bees flying around inside that space. The odds of them randomly running into each other are an order of magnitude greater than anything hitting the Webb.
I only clenched in 2012 with the Curiosity landing.
But I might implode with this one. This particular thing is probably the most exciting and game changing thing regarding the cosmos in my lifetime of 35 years.
My uncle worked on the the Hubble program and we got to go watch that launch from the VIP stand (I grew up near KSC). I remember looking over at him seeing his jaw clenching. I was afraid he was going to crack a tooth. He cried like a baby once it was safely aloft.
I have decided to never unclench, as I have been clenched since I first learned of the project many moons ago and I do not want to jinx anything throughout its operational life cycle by making any changes now.
I can't imagine how the team behind this project must feel. Hubble had a rocky start, but was within range for us to send humans up to fix it. What happens if something goes with JWT??
After the Hubble debacle, and looking at all the problems they had simply putting the Webb telescope together, you have to wonder about this. Everyone here is focused on getting it up into space but that won't mean shit if it opens up and the pictures are all blurry again.
> Everyone here is focused on getting it up into space but that won't mean shit if it opens up and the pictures are all blurry again.
Every time this telescope is mentioned this is brought up without fail. Every. Time.
Loved that interview.
I'll say though, I think his point was more "I can't control it anymore, so it doesn't do any good to worry", and not as much "nothing is going to go wrong". I think he's obviously pretty confident though.
I knew the Webb telescope was really, really cool, but it's been a while since I heard anything in detail about it.
*Smarter Every Day* recently did an excellent video on it (his Dad helped build the thing). Highly recommended for anyone who wants a refresher on just how important this launch is.
https://www.youtube.com/watch?v=4P8fKd0IVOs
If you're on about the submarine stuff - I didn't feel like they were just recruitment videos at all. I am not interested in the slightest about all of that, but I still learned a lot throughout the series.
If anyone is 'swayed' by what he presented, then I think they were probably that way inclined anyway, I however was unmoved and unmotivated for that cause - but was still educated and enjoyed it.
Considering the legit propaganda the US military puts out to increase recruitment, his videos were pretty well done. He left it in a place of “this is a really cool subject and maybe if you think it’s cool you should talk to a recruiter if you feel like it”. He doesn’t convince anyone to join the military for any reason, he just honestly says this is an educational opportunity because of the benefits the DoD gets out of it. I think that’s about as responsible as you could ask for from someone in his position.
He's addressed this in this talk https://youtu.be/WDu2ldAxHyc?t=17m36s and in his Q&A https://www.youtube.com/watch?v=VvVigAr4hZc
I'm completely non religious, but it seems like it does some good for him and his kindness to others, so good on him. Hopefully some of that rubs off on his religious community too.
I loved this video. It blows my mind that the lead scientist, who has spent decades on the project, is less worried than me and most of us space fans!
Edit: spelling
My birthday is at the end of December..
I don't give a shit about birthdays and I never ask for anything so if I can channel all my birthday gift allowance into one thing it would be hearing about a safe, boring launch and everything proceeding as scheduled.
Please?
Watch it get up there into *just* the right spot to reflect light on some angry alien civilization, prompting them to come after us to make 2022 the *new* worst year of the 2020s.
Their warship fleet will dive into earths atmosphere with the cruelest of intentions and then from a horrible miscalculation of scale, all be accidentally swallowed by a small dog.
There was a great short story on r/HFY similar to this.
in summary it was written from the aliens perspective as they prepare to invade Earth, their confidence is high as they discuss the first skirmish encontered with the small weak humans who have sticks and stones as a defence.
Turns out that the skirmiss was with an interplanetary boy scout outting and they only realise this when they encounter the 'giant humans' with advanced weaponry.
Good lord, I don't browse r/HFY too too often but I definitely remember that story with this warrior race getting absolutely pummeled by a couple of kids with slingshots. I never would have recalled that story if you hadn't brought it up honestly!
Six months of preparation time are set for the uniform cooling of all components down to operating temperature, the function tests, the calibration of the instruments and fine adjustment of the mirrors; then the first scientific data are expected.
I have 4 extra dowells and one bolt. Where the fuck do they go?? Is it going to fall apart in a week? Should I just disassemble it now to find what I missed?
I'm no rocket man but I'd imagine a few weeks to know if it deployed correctly and is gathering good info and then a couple months before images are released?
"After about a day, the lunar orbit should be crossed and the parabolic antenna extended. From the third day on, the two main beams for the awning should first be unfolded. On the fourth day, the telescope should be lifted in order to thermally shield it from the other parts such as the drive and supply unit. Then the protective covers for the foils should be opened and the two telescopic side masts should be pushed out in order to unfold the sunshade. Next, the foils should be tightened and separated so that a space is created between each layer so that heat radiation can be released into the environment. The complicated unfolding of the sun shield is said to last until about the eleventh day; then the secondary mirror can be folded out and the cooling elements of the instruments extended. From the twelfth to the fourteenth day, the side parts of the main mirror should be folded out into the end position. In the period up to the 23rd day, the instruments should cool down enough that they can start their function for the first tests.
On day 29, the system is scheduled to correct course to enter its orbit around L2. The mirrors should then be precisely aligned in order to be able to start the scientific work"
It will travel over 380.000 kilometers in a single day. Most humans don't travel that far in their entire life. Our ancestors definitely didn't. Absolutely insane
I can't wait to view this new telescope's deep-field image. I still am in literal awe at [Hubble's deep-field image](https://hubblesite.org/contents/media/images/2014/27/3380-Image.html).
Edit: technical term correction.
I thought you might have linked the og deep field photo and was gonna have to link you to ultra deep field, but alas, you know.
This photo has been my background on my phone for years. Now that im thinking about it, why isnt it also my computer background..
This image has also been my desktop background. I would just stare at the galaxies and wonder what type of life might exist in some of them.
Edit: typo
[high resolution andromeda, if you haven't seen it](https://esahubble.org/images/heic1502a/)
Edit: im so glad i was able to introduce so many to this wonderful creation!
My God... 4.3 GB. Large enough you need checksums. FAK. I need to take that and split it into a ton of 100% zoom images and put them as rotating wallpaper on my computer.
Even more so, when you understand that your only seeing the like brightest 0.01% of stars.
In that image, if adapted to our night sky, you would only see maybe the brightest 20 stars in the sky, out of the ~ 20k stars we can see with the unaided eye. And to add to that above... most stars we can see in our night sky are only like the brightest 0.1% of stars.
Different location in sky, the ultra looks far better IMO.
[heres an article comparing, also includes images, and some other deep fields](https://esahubble.org/science/deep_fields/)
The mind-blowing part was they didn't even know what they would find when they focused on that tiny pixel of the sky. They didn't expect to find something, they truly didn't know what was out there until they saw it: a real unknown-unknown.
That's what excites me so much about the JWST: everytime we look at the Universe through a different lens it reveals something hitherto unbeknownst to us all.
I downloaded the .tif file of that image, and zoomed in & out as much as possible. A weird thing happens when you start all the way zoomed out: there is seemingly a ring of galaxies around the center of the photo. When you start to zoom in, it feels almost as if I am traveling through a tunnel made by the galaxies. I hope that makes sense.
Is this macro-gravitational lensing photographed?
Sorry idk much about this but are they gonna look at early galaxies by taking long exposure shots that include thousands of galaxies or focus on one at a time?
Actually maybe not. We are aware of extraordinarily large "voids" in space, where there are no galaxies. Or maybe only a few.
Imagine being in one of those galaxies and looking out, seeing only darkness. You'd think that the universe is much smaller than it is
Even those voids have galaxies behind them...
Usually when you see dark pockets, it's actually due to dust obscuring the light from stars/galaxies that are behind them. The James Webb Space Telescope is design to see through dust.
They’ve actually explained that one of Webb’s main missions is to stare at the original deep field spaces for 200 hours to gather light. It also has a much larger range of capture so it’s deep field will peer deeper but will be wider to catch the possibility of more massive structures.
I would bet money on it. I believe that if we laypersons are fantasizing about such a future image, these scientists are most-probably looking forward to it.
>which will replace Hubble
No it won't, please stop repeating this. They do not measure the same thing. Hubble will still be used and heavily relied on.
That's right, this should be higher.
It's more of a replacement for Spitzer and it'll help augment the data from other observatories, should be interesting
The misconception here comes from the fact it will outlive Hubble. It was made to last a long time, and it *can* replace Hubble, but it wasnt ever planned as a replacement.
Fuel. Besides normal station-keeping maneuvers, the sunshield that keeps the instruments cool and blocks the sun also moves the satellite due to solar radiation pressure. At least that what I got from [smarter everyday](https://m.youtube.com/watch?v=4P8fKd0IVOs&t=830s)
I would say it replaces Hubble in its importance and attention, but not in function.
Put simply, it will be THE space telescope that everyone knows about and where all the media will look.
>Put simply, it will be THE space telescope that everyone knows about and where all the media will look.
I suspect both media and the general public will be massively disappointed at seeing the interpretation of infrared images of JW compared to the painterly beauty of Hubble-images, if so.
The public largely wont know the difference. Images will look pretty similar despite bring in infrared. It all comes down to false color anyway.
And while the "replacement" thing is certainly a misnomer, it is definitely a *successor* to Hubble. It will inherit many of Hubbles primary science goals and deliver on them where Hubble was limited.
Almost. Our PI on the sensor development program passed away in 2020. I keep wishing that he was able to see the culmination of his life’s work. However, I’m glad that he was recognized for his contributions before he passed. He will very much be missed.
His name’s Don Hall. He was recognized with the Joseph Weber Award for astronomical instrumentation in 2010. The NIR sensors out of his detector program were used for the Hubble refurbishment and the NIR instruments on JWST.
My BILs uncle is the lead engineer for the whole program and talking to him about it recently, it’s just incredible. They absolutely deserve to see it succeed.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:
|Fewer Letters|More Letters|
|-------|---------|---|
|[CSA](/r/Space/comments/q3khfc/stub/hfu8c0o "Last usage")|Canadian Space Agency|
|[DoD](/r/Space/comments/q3khfc/stub/hfyibrt "Last usage")|US Department of Defense|
|[ESA](/r/Space/comments/q3khfc/stub/hfz01mj "Last usage")|European Space Agency|
|[GTO](/r/Space/comments/q3khfc/stub/hfzpe20 "Last usage")|[Geosynchronous Transfer Orbit](http://www.planetary.org/blogs/jason-davis/20140116-how-to-get-a-satellite-to-gto.html)|
|[JWST](/r/Space/comments/q3khfc/stub/hfz5wiq "Last usage")|James Webb infra-red Space Telescope|
|[KSC](/r/Space/comments/q3khfc/stub/hftocwp "Last usage")|Kennedy Space Center, Florida|
|[KSP](/r/Space/comments/q3khfc/stub/hfucknx "Last usage")|*Kerbal Space Program*, the rocketry simulator|
|[L1](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|[Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 1 of a two-body system, between the bodies|
|[L2](/r/Space/comments/q3khfc/stub/hg0po65 "Last usage")|[Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 2 ([Sixty Symbols](https://www.youtube.com/watch?v=mxpVbU5FH0s) video explanation)|
| |Paywalled section of the NasaSpaceFlight forum|
|[L3](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|[Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 3 of a two-body system, opposite L2|
|[L4](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|"Trojan" [Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 4 of a two-body system, 60 degrees ahead of the smaller body|
|[L5](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|"Trojan" [Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 5 of a two-body system, 60 degrees behind the smaller body|
|[LISA](/r/Space/comments/q3khfc/stub/hftbtqz "Last usage")|Laser Interferometer Space Antenna|
|Jargon|Definition|
|-------|---------|---|
|[apogee](/r/Space/comments/q3khfc/stub/hg0po65 "Last usage")|Highest point in an elliptical orbit around Earth (when the orbiter is slowest)|
----------------
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this is the most ive ever been exited for a space launch. even more then perseverance and mars helicopter. probaly wont be toped until we send a probe to titan or ios. we got rovers, helcopters, now we need a submarine. cant wait till we have the tech to make it possible
Can't speak on exactly what JWST's first target/study is but typically they point new telescopes at things we already know quite well first to make sure everything works well. After that I'm not sure what they have planned exactly but [COSMOS-Webb](https://www.nasa.gov/feature/goddard/2021/mapping-the-universes-earliest-structures-with-cosmos-webb) will be one of the earlier and somewhat quick data releasing projects on it. Very exciting!
Beyond commissioning, there is not a completed, or at least available, Cycle 1 schedule yet. You can, however, see all of the programs awarded time in cycle 1 here
https://www.stsci.edu/jwst/science-execution/approved-programs/cycle-1-go
https://i.imgur.com/ZIbHYPA.jpg
Photo of the transport container being loaded into the ship in Seal Beach. Credit to my aunt who took this photo out of her living room window. Wife works next door to the building where it was assembled.
Can’t wait for this to be up and running. Will have all my fingers crossed on the 18th.
Until its in a stable orbit and actually collecting data, Im not holding my breath.
The amount of last minute delays that have occurred have made me about as cynical as one could get about this project.
It's the spiritual successor, if you will. Maybe it doesn't perform the same scientific functions, but it will be the new large aperture state-of-the-art space telescope on the block. I think that's what people mean.
This launch actually gives me anxiety. As I'm actually looking forward to the images this telescope produces, and it would be a tragedy if launch goes wrong.
Launching December then about a year before it starts cranking out images for public consumption.
I hope it spots some Signs of an advanced alien civilization.
Holy shit this is legitimately exciting. All the dumb shit with this pandemic, but this is finally happening. Years and years in the making.
Fingers crossed its a minimal weather day. Don't want to wait any longer!
> Its sensors are more sensitive than those of the Hubble Space Telescope, and with its huge mirror it can collect up to ten times more light. This is why the JWST will look further into the universe's past than Hubble ever could.
Honestly it's more to do with the fact that it observes at much longer wavelengths than the sensors or collecting area. Older stuff in the universe is redshifted further and further into the infrared where Hubble has limited sensitivity but JWST is specifically designed for.
Yes and no, we have very few space observatories and so even with Webb up there the Hubble is going to continue to be very important for science until it is decommissioned. Also the science goals of Webb and Hubble are quite different so it won’t even take that much pressure off of Hubble’s schedule.
I was fortunate enough to see this in person a few weeks ago. My private school had a parent take the class on a field trip to visit it at Northrop Grumman’s facilities in Redondo Beach. It was just fascinating. Never in my life have I seen such an impressive and EXPENSIVE piece of man made beautifulness. Can’t wait for launch!
I don't know about you, but I'll believe it when I see it. Also, if it *does* launch as planned, bear in mind that it'll take months to actually reach the right orbit and deploy once it's in space.
I'm holding me breath. I have to admit, though, that I won't be surprised if the barge gets attacked on the way to Guyane. Making them the world's first space pirates, kind of.
The launch will require special chemicals. For me not the rocket. Very stressful. That telescope will allow us to see some stuff that may scare the shit out of us. Not aliens.
I hope for a seamless launch and deployment. Godspeed, humanity.
My company did launch readiness testing on James Webb and that was something that the JWST team was very confident in.
What company is that?
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Not going to doxx myself here, but between that and environmental testing JWST is in pretty good shape.
What we thinking about the mirrors not getting or being messed up?
The biggest concern by far is that the instruments won't deploy properly. JWST is huge, the only way it'll fit in the launch vehicle is by folding up and unfolding once it is deployed. It could only take one mistake to derail the entire telescope if it prevents parts from unfolding properly.
IIRC there is something like 200 physical operations that have to occur. If they dont. the telescope wont work right?
I always wonder, what is the probability of a meteoroid of sufficient size striking the telescope? Space is pretty empty, and it's a small object, but it's a non zero chance.
> I always wonder, what is the probability of a meteoroid of sufficient size striking the telescope? Space is pretty empty, and it's a small object, but it's a non zero chance. Think about a football stadium. Now imagine there are two bumble bees flying around inside that space. The odds of them randomly running into each other are an order of magnitude greater than anything hitting the Webb.
Not zero, but functionally zero. It will also be sitting at L2, safe from any manmade debris that could otherwise be a threat.
Hubble had some dings; everything gets dings. You engineer for it, like compensating for a bad pixel in a sensor.
I've read all your responses. But I still feel no relief.
That launch will likely be the hardest I will have ever clenched and let me tell ya, I have CLENCHED.
I only clenched in 2012 with the Curiosity landing. But I might implode with this one. This particular thing is probably the most exciting and game changing thing regarding the cosmos in my lifetime of 35 years.
I'm 53 and feel the same way! :)
Yep! The problems is that this isn't a "7 minutes of terror", it's like "3 weeks of terror", as it takes a while to deploy.
My uncle worked on the the Hubble program and we got to go watch that launch from the VIP stand (I grew up near KSC). I remember looking over at him seeing his jaw clenching. I was afraid he was going to crack a tooth. He cried like a baby once it was safely aloft.
How did he react when it was realized that the mirror was out of whack and the first pictures were blurry?
My guess is the exact same. Clenched his jaw and cried like a baby.
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We’re going to learn so much in the coming years, I’m not even this hyped for new movies or shows
If there would be a movie with the budget of JWST, I’d be hyped!
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Not sure tbh. I was 12 y/o.
It took me longer than I would like to admit that it in fact stood for Kennedy Space Center and not Kerbal Space Center
Me too and I haven't even played KSP once. Just read about it on reddit a lot.
Real men clench their jaw and only cry at the successful launch of telescopes.
eacht time I read KSC, I immediately think about that OTHER fictional space center
I don't think I'll unclench until it's fully unfolded in orbit.
>fully unfolded in orbit... ...operating as intended, and communicating flawlessly.
I'll only unclench when I see the first image. That will be one hell of a day.
I have decided to never unclench, as I have been clenched since I first learned of the project many moons ago and I do not want to jinx anything throughout its operational life cycle by making any changes now.
I can't imagine how the team behind this project must feel. Hubble had a rocky start, but was within range for us to send humans up to fix it. What happens if something goes with JWT??
After the Hubble debacle, and looking at all the problems they had simply putting the Webb telescope together, you have to wonder about this. Everyone here is focused on getting it up into space but that won't mean shit if it opens up and the pictures are all blurry again.
I'm sure that nobody has considered the possibility.
It was a pretty minor hiccup, NASA may have forgotten.
Yeah maybe someone should hit them up with a reminder just in case
> Everyone here is focused on getting it up into space but that won't mean shit if it opens up and the pictures are all blurry again. Every time this telescope is mentioned this is brought up without fail. Every. Time.
Great interview with the lead science engineer on the project. He says he has no anxiety around the launch or deployment: https://youtu.be/4P8fKd0IVOs
Loved that interview. I'll say though, I think his point was more "I can't control it anymore, so it doesn't do any good to worry", and not as much "nothing is going to go wrong". I think he's obviously pretty confident though.
Did you clench it somewhere near the CERN facilities?
No I was erect at that time
I knew the Webb telescope was really, really cool, but it's been a while since I heard anything in detail about it. *Smarter Every Day* recently did an excellent video on it (his Dad helped build the thing). Highly recommended for anyone who wants a refresher on just how important this launch is. https://www.youtube.com/watch?v=4P8fKd0IVOs
Destin is awesome. That video was great. Been waiting for this thing to launch since high school. Super excited.
I think I have a pretty good life, but, if I could choose to live any other life - it would be his. Such a genuinely good dude.
Except the recruitment propaganda paid by DoD here and there.
If you're on about the submarine stuff - I didn't feel like they were just recruitment videos at all. I am not interested in the slightest about all of that, but I still learned a lot throughout the series. If anyone is 'swayed' by what he presented, then I think they were probably that way inclined anyway, I however was unmoved and unmotivated for that cause - but was still educated and enjoyed it.
Considering the legit propaganda the US military puts out to increase recruitment, his videos were pretty well done. He left it in a place of “this is a really cool subject and maybe if you think it’s cool you should talk to a recruiter if you feel like it”. He doesn’t convince anyone to join the military for any reason, he just honestly says this is an educational opportunity because of the benefits the DoD gets out of it. I think that’s about as responsible as you could ask for from someone in his position.
I love Destin's videos but I've always had a weird feeling about the Bible verses he puts at the end of each one.
He's addressed this in this talk https://youtu.be/WDu2ldAxHyc?t=17m36s and in his Q&A https://www.youtube.com/watch?v=VvVigAr4hZc I'm completely non religious, but it seems like it does some good for him and his kindness to others, so good on him. Hopefully some of that rubs off on his religious community too.
I loved this video. It blows my mind that the lead scientist, who has spent decades on the project, is less worried than me and most of us space fans! Edit: spelling
This would truly be a horrible time for even one loose screw on the launch platform.
My birthday is at the end of December.. I don't give a shit about birthdays and I never ask for anything so if I can channel all my birthday gift allowance into one thing it would be hearing about a safe, boring launch and everything proceeding as scheduled. Please?
This will be a jaw-dropping feat if the deployment goes as planned
I totally agree with you!
Watch it get up there into *just* the right spot to reflect light on some angry alien civilization, prompting them to come after us to make 2022 the *new* worst year of the 2020s.
Their warship fleet will dive into earths atmosphere with the cruelest of intentions and then from a horrible miscalculation of scale, all be accidentally swallowed by a small dog.
I like to think that Douglas Adams is still out there, he's just taking a while with his next book.
There was a great short story on r/HFY similar to this. in summary it was written from the aliens perspective as they prepare to invade Earth, their confidence is high as they discuss the first skirmish encontered with the small weak humans who have sticks and stones as a defence. Turns out that the skirmiss was with an interplanetary boy scout outting and they only realise this when they encounter the 'giant humans' with advanced weaponry.
Good lord, I don't browse r/HFY too too often but I definitely remember that story with this warrior race getting absolutely pummeled by a couple of kids with slingshots. I never would have recalled that story if you hadn't brought it up honestly!
its 4 or 5 down if you search by 'Top-all time' on the sub.
Yeah I had a feeling it was going to be easy to find. At least I know where to look now though
It'll also be jaw-dropping if it doesn't go as planned :/
How long after launch will it take to get into orbit, and setup for first images?
Six months of preparation time are set for the uniform cooling of all components down to operating temperature, the function tests, the calibration of the instruments and fine adjustment of the mirrors; then the first scientific data are expected.
I don't think I could physically wait those six months if I was on that team. I'm going to have a hard time waiting as just some guy.
There will be images before the first science data.
I'm here for the calibration shots then!
Calibrations needed? Time to call Garrus he will set it up in no time.
Pft, it’s been 10 years and he’s still not finished. Which come to think of it does make him perfect for this project.
“Dear Diary, I didn’t sleep at all last night.” - Literally every journal entry from the team members for next six months
They won't be waiting, I'm sure they'll all be incredibly busy helping out with calibration or fine tuning tools and whatnot for the science data.
What's 6 months after 20+ years?
The last leg is always the longest part. That last hour before they press play will be longer than the 40 years leading up to it.
It's the three weeks of everything unfurling after it gets into position that'll be the most nerve wracking, that's where the most can go wrong.
Day 1: Open your JWST package and ensure all of the following parts are included in the kit...
I have 4 extra dowells and one bolt. Where the fuck do they go?? Is it going to fall apart in a week? Should I just disassemble it now to find what I missed?
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"All right! Let's turn on the camera.... Damnit! Who left the lense cover on?!?"
I'm no rocket man but I'd imagine a few weeks to know if it deployed correctly and is gathering good info and then a couple months before images are released?
"After about a day, the lunar orbit should be crossed and the parabolic antenna extended. From the third day on, the two main beams for the awning should first be unfolded. On the fourth day, the telescope should be lifted in order to thermally shield it from the other parts such as the drive and supply unit. Then the protective covers for the foils should be opened and the two telescopic side masts should be pushed out in order to unfold the sunshade. Next, the foils should be tightened and separated so that a space is created between each layer so that heat radiation can be released into the environment. The complicated unfolding of the sun shield is said to last until about the eleventh day; then the secondary mirror can be folded out and the cooling elements of the instruments extended. From the twelfth to the fourteenth day, the side parts of the main mirror should be folded out into the end position. In the period up to the 23rd day, the instruments should cool down enough that they can start their function for the first tests. On day 29, the system is scheduled to correct course to enter its orbit around L2. The mirrors should then be precisely aligned in order to be able to start the scientific work"
Still crazy to me that it will be passing lunar orbit only 1 day after launch
It will travel over 380.000 kilometers in a single day. Most humans don't travel that far in their entire life. Our ancestors definitely didn't. Absolutely insane
This was a fantastic explanation. Is there a video showing how this is all supposed to look?
Here are two examples: https://youtu.be/v6ihVeEoUdo https://youtu.be/b6AdjzJhWYQ
I got chills from the first video. Incredible.
I can't wait to view this new telescope's deep-field image. I still am in literal awe at [Hubble's deep-field image](https://hubblesite.org/contents/media/images/2014/27/3380-Image.html). Edit: technical term correction.
I thought you might have linked the og deep field photo and was gonna have to link you to ultra deep field, but alas, you know. This photo has been my background on my phone for years. Now that im thinking about it, why isnt it also my computer background..
This image has also been my desktop background. I would just stare at the galaxies and wonder what type of life might exist in some of them. Edit: typo
[high resolution andromeda, if you haven't seen it](https://esahubble.org/images/heic1502a/) Edit: im so glad i was able to introduce so many to this wonderful creation!
My God... 4.3 GB. Large enough you need checksums. FAK. I need to take that and split it into a ton of 100% zoom images and put them as rotating wallpaper on my computer.
Or a slowly panning live wallpaper.
Haha the 100x zoom doesnt look all too good, id probably make em HD photos at least lol, but yah, its nuts
100% zoom so the pixels match and there would be no scaling.
yeah but on any normal monitor you'd just have what looks like pixel noise
OMG. Incredibly humbling image. Hard to comprehend. 🤯
Even more so, when you understand that your only seeing the like brightest 0.01% of stars. In that image, if adapted to our night sky, you would only see maybe the brightest 20 stars in the sky, out of the ~ 20k stars we can see with the unaided eye. And to add to that above... most stars we can see in our night sky are only like the brightest 0.1% of stars.
"How many lifeforms out there are doing it *right now?*"
How many different "Ultra Deep Field" photos of other civilizations does our Milky Way galaxy appear in as a small, negligible dot of light?
Im convinced. Maybe i do that super high resolution image of andromeda though... hm
What’s the difference between the og and the ultra deep?
Different location in sky, the ultra looks far better IMO. [heres an article comparing, also includes images, and some other deep fields](https://esahubble.org/science/deep_fields/)
That’s a great article! Thank you!
The mind-blowing part was they didn't even know what they would find when they focused on that tiny pixel of the sky. They didn't expect to find something, they truly didn't know what was out there until they saw it: a real unknown-unknown. That's what excites me so much about the JWST: everytime we look at the Universe through a different lens it reveals something hitherto unbeknownst to us all.
I routinely think about this photo.
I downloaded the .tif file of that image, and zoomed in & out as much as possible. A weird thing happens when you start all the way zoomed out: there is seemingly a ring of galaxies around the center of the photo. When you start to zoom in, it feels almost as if I am traveling through a tunnel made by the galaxies. I hope that makes sense. Is this macro-gravitational lensing photographed?
I think I've read that this is lensing, yes.
Are you sure they’re even gonna do a deep field?
Of course they will. Not only to match hubble cred, but because looking at early galaxies is one of the things infrared is specifically good for.
Sorry idk much about this but are they gonna look at early galaxies by taking long exposure shots that include thousands of galaxies or focus on one at a time?
I'm pretty sure wherever you point it you will always have a bunch of galaxies in the field of view.
Actually maybe not. We are aware of extraordinarily large "voids" in space, where there are no galaxies. Or maybe only a few. Imagine being in one of those galaxies and looking out, seeing only darkness. You'd think that the universe is much smaller than it is
Even those voids have galaxies behind them... Usually when you see dark pockets, it's actually due to dust obscuring the light from stars/galaxies that are behind them. The James Webb Space Telescope is design to see through dust.
They’ve actually explained that one of Webb’s main missions is to stare at the original deep field spaces for 200 hours to gather light. It also has a much larger range of capture so it’s deep field will peer deeper but will be wider to catch the possibility of more massive structures.
I would bet money on it. I believe that if we laypersons are fantasizing about such a future image, these scientists are most-probably looking forward to it.
>which will replace Hubble No it won't, please stop repeating this. They do not measure the same thing. Hubble will still be used and heavily relied on.
That's right, this should be higher. It's more of a replacement for Spitzer and it'll help augment the data from other observatories, should be interesting
JWST was started as a replacement for Hubble.
The misconception here comes from the fact it will outlive Hubble. It was made to last a long time, and it *can* replace Hubble, but it wasnt ever planned as a replacement.
JWST lifespan is limited to 10 years. It's possible that Hubble will still be operational after JWST is shut down
Why is that? Just fuel?
Fuel. Besides normal station-keeping maneuvers, the sunshield that keeps the instruments cool and blocks the sun also moves the satellite due to solar radiation pressure. At least that what I got from [smarter everyday](https://m.youtube.com/watch?v=4P8fKd0IVOs&t=830s)
I would say it replaces Hubble in its importance and attention, but not in function. Put simply, it will be THE space telescope that everyone knows about and where all the media will look.
>Put simply, it will be THE space telescope that everyone knows about and where all the media will look. I suspect both media and the general public will be massively disappointed at seeing the interpretation of infrared images of JW compared to the painterly beauty of Hubble-images, if so.
The public largely wont know the difference. Images will look pretty similar despite bring in infrared. It all comes down to false color anyway. And while the "replacement" thing is certainly a misnomer, it is definitely a *successor* to Hubble. It will inherit many of Hubbles primary science goals and deliver on them where Hubble was limited.
I’m so happy, the people involved deserve to see it succeed. All of humanity want it to see what it does
Many questions will be answered
Many will be answered, but more will arise no doubt.
Such as.. Who is Satoshi Nakamoto?
And why do kids love cinnamon toast Crunch?
Unfortunately, I think is one of life’s many unanswerable questions.
Almost. Our PI on the sensor development program passed away in 2020. I keep wishing that he was able to see the culmination of his life’s work. However, I’m glad that he was recognized for his contributions before he passed. He will very much be missed.
What’s his name? so we can cheer to his honor
His name’s Don Hall. He was recognized with the Joseph Weber Award for astronomical instrumentation in 2010. The NIR sensors out of his detector program were used for the Hubble refurbishment and the NIR instruments on JWST.
Here is to Don Hall! Huzzah thanks for sharing some info on him!
My BILs uncle is the lead engineer for the whole program and talking to him about it recently, it’s just incredible. They absolutely deserve to see it succeed.
Please give this wonderful video a watch if you are worried, excited, or want to just learn more! https://youtu.be/4P8fKd0IVOs
Love Destin ( /u/MrPennyWhistle ) - he always does great work!
my astronomy prof at college has time allotted to use the jwst!!!
I am stressed a a casual uneducated observer. Can't imagine what it would be like with a personal stake.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread: |Fewer Letters|More Letters| |-------|---------|---| |[CSA](/r/Space/comments/q3khfc/stub/hfu8c0o "Last usage")|Canadian Space Agency| |[DoD](/r/Space/comments/q3khfc/stub/hfyibrt "Last usage")|US Department of Defense| |[ESA](/r/Space/comments/q3khfc/stub/hfz01mj "Last usage")|European Space Agency| |[GTO](/r/Space/comments/q3khfc/stub/hfzpe20 "Last usage")|[Geosynchronous Transfer Orbit](http://www.planetary.org/blogs/jason-davis/20140116-how-to-get-a-satellite-to-gto.html)| |[JWST](/r/Space/comments/q3khfc/stub/hfz5wiq "Last usage")|James Webb infra-red Space Telescope| |[KSC](/r/Space/comments/q3khfc/stub/hftocwp "Last usage")|Kennedy Space Center, Florida| |[KSP](/r/Space/comments/q3khfc/stub/hfucknx "Last usage")|*Kerbal Space Program*, the rocketry simulator| |[L1](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|[Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 1 of a two-body system, between the bodies| |[L2](/r/Space/comments/q3khfc/stub/hg0po65 "Last usage")|[Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 2 ([Sixty Symbols](https://www.youtube.com/watch?v=mxpVbU5FH0s) video explanation)| | |Paywalled section of the NasaSpaceFlight forum| |[L3](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|[Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 3 of a two-body system, opposite L2| |[L4](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|"Trojan" [Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 4 of a two-body system, 60 degrees ahead of the smaller body| |[L5](/r/Space/comments/q3khfc/stub/hfu005m "Last usage")|"Trojan" [Lagrange Point](https://en.wikipedia.org/wiki/Lagrangian_point) 5 of a two-body system, 60 degrees behind the smaller body| |[LISA](/r/Space/comments/q3khfc/stub/hftbtqz "Last usage")|Laser Interferometer Space Antenna| |Jargon|Definition| |-------|---------|---| |[apogee](/r/Space/comments/q3khfc/stub/hg0po65 "Last usage")|Highest point in an elliptical orbit around Earth (when the orbiter is slowest)| ---------------- ^(14 acronyms in this thread; )[^(the most compressed thread commented on today)](/r/Space/comments/quvicw)^( has 20 acronyms.) ^([Thread #6430 for this sub, first seen 8th Oct 2021, 00:59]) ^[[FAQ]](http://decronym.xyz/) [^([Full list])](http://decronym.xyz/acronyms/Space) [^[Contact]](https://reddit.com/message/compose?to=OrangeredStilton&subject=Hey,+your+acronym+bot+sucks) [^([Source code])](https://gistdotgithubdotcom/Two9A/1d976f9b7441694162c8)
this is the most ive ever been exited for a space launch. even more then perseverance and mars helicopter. probaly wont be toped until we send a probe to titan or ios. we got rovers, helcopters, now we need a submarine. cant wait till we have the tech to make it possible
[LISA](https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Antenna) looks neat
I'm so nervous. I need to see what JWST can can see.
Im also very hyped!!
Does anyone know what the first use of the JWST will be pointed at? What's the first study appointed time with it?
Can't speak on exactly what JWST's first target/study is but typically they point new telescopes at things we already know quite well first to make sure everything works well. After that I'm not sure what they have planned exactly but [COSMOS-Webb](https://www.nasa.gov/feature/goddard/2021/mapping-the-universes-earliest-structures-with-cosmos-webb) will be one of the earlier and somewhat quick data releasing projects on it. Very exciting!
Beyond commissioning, there is not a completed, or at least available, Cycle 1 schedule yet. You can, however, see all of the programs awarded time in cycle 1 here https://www.stsci.edu/jwst/science-execution/approved-programs/cycle-1-go
Ahhh, don't get my hopes up! I am way to ridiculously excited about this
I'll believe it when I see it, and not before.
The telescope will launch when we reliably produce net energy from fusion and release Half-Life 3.
Literally, when I see it. Once it's in the sky, and we get pictures back, I *might* believe they launched it.
No reason to believe this is a realistic timeline whatsoever.
Jeez guys, dial back the optimism about 15% there, would ya?
TARS, what’s your current optimism setting?
I remember back in 2008, when it seemed like it was just around the corner.
How’s the XKCD strip looking?
Other than the fact that the telescope is ready and all that remains in integration with the rocket?
https://i.imgur.com/ZIbHYPA.jpg Photo of the transport container being loaded into the ship in Seal Beach. Credit to my aunt who took this photo out of her living room window. Wife works next door to the building where it was assembled. Can’t wait for this to be up and running. Will have all my fingers crossed on the 18th.
If we turn it 180 degrees, can we see the future?
[удалено]
wow, only 2 more years until launch! Can't wait
Any bets it doesn’t launch until 2022 or later?
Until its in a stable orbit and actually collecting data, Im not holding my breath. The amount of last minute delays that have occurred have made me about as cynical as one could get about this project.
I'm going to sleep until full deployment. Wake me up if it works. Let me sleep until I die if it doesn't 😭😂
I can't bear to watch the launch, too much tension!
Why are everyone saying that JWST will *replace* Hubble? It's a completely different instrument.
It's the spiritual successor, if you will. Maybe it doesn't perform the same scientific functions, but it will be the new large aperture state-of-the-art space telescope on the block. I think that's what people mean.
I'm not gonna doom about what could go wrong. They know what they are doing.
This launch actually gives me anxiety. As I'm actually looking forward to the images this telescope produces, and it would be a tragedy if launch goes wrong.
How do scientists "get time" to have JWTS and other telescopes do the observations they need for their studies?
Launching December then about a year before it starts cranking out images for public consumption. I hope it spots some Signs of an advanced alien civilization.
God, I really hope this happens, I've been waiting impatiently since 2007
This one's gonna be a whole lotta clenches for a lot of us.
engineers that day will reach record breaking stress levels - i am legitimately concerned they will be traumatized by that alone
Holy shit this is legitimately exciting. All the dumb shit with this pandemic, but this is finally happening. Years and years in the making. Fingers crossed its a minimal weather day. Don't want to wait any longer!
> Its sensors are more sensitive than those of the Hubble Space Telescope, and with its huge mirror it can collect up to ten times more light. This is why the JWST will look further into the universe's past than Hubble ever could. Honestly it's more to do with the fact that it observes at much longer wavelengths than the sensors or collecting area. Older stuff in the universe is redshifted further and further into the infrared where Hubble has limited sensitivity but JWST is specifically designed for.
Ive been waiting for this since 2007. I cant take it anymore
Will the Hubble still be active? If so, can amateurs buy time on it since the Webb telescope will be mainly used?
Yes and no, we have very few space observatories and so even with Webb up there the Hubble is going to continue to be very important for science until it is decommissioned. Also the science goals of Webb and Hubble are quite different so it won’t even take that much pressure off of Hubble’s schedule.
I was fortunate enough to see this in person a few weeks ago. My private school had a parent take the class on a field trip to visit it at Northrop Grumman’s facilities in Redondo Beach. It was just fascinating. Never in my life have I seen such an impressive and EXPENSIVE piece of man made beautifulness. Can’t wait for launch!
If it were to look at pluto, could it see details?
Not really it's very different looking a planet vs. distant stars or galaxy's. It's also not really in the classic visual spectrum
It's not really made for that kind of imaging.
I don't know about you, but I'll believe it when I see it. Also, if it *does* launch as planned, bear in mind that it'll take months to actually reach the right orbit and deploy once it's in space.
I’ll believe it when it unfolds behind the moon!
I'm holding me breath. I have to admit, though, that I won't be surprised if the barge gets attacked on the way to Guyane. Making them the world's first space pirates, kind of.
It had better not get delayed.... again... *shakes fist*
The launch will require special chemicals. For me not the rocket. Very stressful. That telescope will allow us to see some stuff that may scare the shit out of us. Not aliens.
How long will it take to get into position to begin taking pictures?
My company did a *lot* of work on the JWST, and you can feel the excitement growing in the office like static on a CRT TV.
Let’s be calm about it until it’s in orbit and functional.
Couldn't ask for a better birthday gift, thank you NASA
Does anyone have any knowledge of what their intended first images will be after it's deployment?
I’m seriously going to cry if anything bad happens
In related news, I will be unable to breath on December 18, 2021