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(CNN)   Mirror spreadin' out / Thrusters powered down / About that dish inside Lagrange / And you know what I'm talkin' about / Just gotta wait for it to calibrate / On that Webb, sights new and strange / They got a lot of nice views   (cnn.com) divider line
    More: Followup, Gravitation, Lagrangian point, Sun, Orbit, NASA, Celestial mechanics, Satellite, Rocket  
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1012 clicks; posted to STEM » on 24 Jan 2022 at 9:45 PM (16 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



34 Comments     (+0 »)
View Voting Results: Smartest and Funniest
 
2022-01-24 7:36:33 PM  
A-how how how how long you been waitin to drop that one, subby?
 
2022-01-24 8:27:01 PM  
Fingers still crossed! The calibration is supposed to take two months and I'm farking hoping they don't get a stuck motor or something on any of the mirrors. But if they do, I want to name the uncooperative mirror "Billy."

/I have my reasons
//you know them, Billy.
 
2022-01-24 10:13:31 PM  
Have mercy!
 
2022-01-24 10:15:42 PM  
An announcer on local (Baltimore) radio explained that Webb will stay cool by facing Earth's night side.

No, not humor.  Just bad science reporting.
 
2022-01-24 10:20:46 PM  

markie_farkie: A-how how how how long you been waitin to drop that one, subby?


26 years
 
2022-01-24 10:36:34 PM  

Creepy Lurker Guy: An announcer on local (Baltimore) radio explained that Webb will stay cool by facing Earth's night side.

No, not humor.  Just bad science reporting.


was it 98rock? I love that station but they constantly get anything science related wrong.. at this point it has to be a bit.
 
2022-01-24 10:42:21 PM  
Fark user imageView Full Size


markie_farkie: A-how how how how long you been waitin to drop that one, subby?


Spur of the moment. Every Farker's crazy 'bout a sharp tongued man.
 
2022-01-24 10:54:02 PM  
4.bp.blogspot.comView Full Size
 
2022-01-24 10:54:13 PM  
Now that Webb is in orbit, the spacecraft will spend the next five months calibrating its instruments.

It would have taken only five weeks if George Michael were still with us.

Fark user imageView Full Size
 
2022-01-24 10:59:58 PM  

khitsicker: was it 98rock?


WBJC
 
2022-01-25 1:25:04 AM  

Lsherm: Fingers still crossed! The calibration is supposed to take two months and I'm farking hoping they don't get a stuck motor or something on any of the mirrors. But if they do, I want to name the uncooperative mirror "Billy."

/I have my reasons
//you know them, Billy.


SCREW YOU BILLY | Jacksepticeye Killing Billy Compilation
Youtube AKS46tQs8Uk
 
2022-01-25 2:17:46 AM  

Lsherm: Fingers still crossed! The calibration is supposed to take two months and I'm farking hoping they don't get a stuck motor or something on any of the mirrors. But if they do, I want to name the uncooperative mirror "Billy."

/I have my reasons
//you know them, Billy.


All of the actuators have already completed a half-inch move out from their launch positions, so that should be good. The radius-of-curvature adjustment I don't know if they've tested.
 
2022-01-25 5:38:09 AM  
farking awesome!

There were so many potential catastrophic mission-failure points throughout launch and deployment, but the bloody mission has essentially been flawless. Excellent work by all involved- especially the engineering team.
 
2022-01-25 5:42:21 AM  
 
2022-01-25 6:10:35 AM  

Langdon_777: I am so hoping that his is a joke article:

https://www.dailykos.com/stories/2022/1/24/2073672/-The-Webb-Telescope-Has-Fully-Unfolded-But-There-are-Problems


You neednt worry.
 
2022-01-25 6:14:23 AM  

ISO15693: Langdon_777: I am so hoping that his is a joke article:

https://www.dailykos.com/stories/2022/1/24/2073672/-The-Webb-Telescope-Has-Fully-Unfolded-But-There-are-Problems

You neednt worry.


I can just never tell anymore, my faith is all but gone.
 
2022-01-25 6:44:02 AM  
...A thousand pardons, but could someone please tell me what tune I'm supposed to sing the headline to?

/Thought it was 'Benson, Arizona' but it didn't quite work
//Too obscure?
 
2022-01-25 8:26:49 AM  

Langdon_777: I am so hoping that his is a joke article:

https://www.dailykos.com/stories/2022/1/24/2073672/-The-Webb-Telescope-Has-Fully-Unfolded-But-There-are-Problems


It has a snark tag, plus if you read all the way thru it's ridiculous.
 
2022-01-25 9:42:47 AM  
Holy shiat didn't know it went out that far! Can't wait to see the pics
 
2022-01-25 9:58:28 AM  

AtlanticCoast63: ...A thousand pardons, but could someone please tell me what tune I'm supposed to sing the headline to?

/Thought it was 'Benson, Arizona' but it didn't quite work
//Too obscure?


"Teach it Phenomenology."

(Sorry, don't know what the right tune is.)
 
2022-01-25 11:45:55 AM  

Nicholas D. Wolfwood: AtlanticCoast63: ...A thousand pardons, but could someone please tell me what tune I'm supposed to sing the headline to?

/Thought it was 'Benson, Arizona' but it didn't quite work
//Too obscure?

"Teach it Phenomenology."

(Sorry, don't know what the right tune is.)


We know who we are, don't we?

/Gonna go feed the Beachball
 
2022-01-25 11:53:39 AM  

AtlanticCoast63: Nicholas D. Wolfwood: AtlanticCoast63: ...A thousand pardons, but could someone please tell me what tune I'm supposed to sing the headline to?

/Thought it was 'Benson, Arizona' but it didn't quite work
//Too obscure?

"Teach it Phenomenology."

(Sorry, don't know what the right tune is.)

We know who we are, don't we?

/Gonna go feed the Beachball


Don't forget to clean the elevator!
 
2022-01-25 12:02:12 PM  
HOTY candidate, +1 subs
 
2022-01-25 12:50:42 PM  

AtlanticCoast63: ...A thousand pardons, but could someone please tell me what tune I'm supposed to sing the headline to?

/Thought it was 'Benson, Arizona' but it didn't quite work
//Too obscure?


Try

ZZ Top - La Grange
Youtube Vppbdf-qtGU

They got a lot a nice women...
 
2022-01-25 1:06:38 PM  

TofuTheAlmighty: [Fark user image 599x550]

markie_farkie: A-how how how how long you been waitin to drop that one, subby?

Spur of the moment. Every Farker's crazy 'bout a sharp tongued man.


Yeah, well...

Fark user imageView Full Size


/I-95, How-how-how-land, ME
 
2022-01-25 1:31:33 PM  

Langdon_777: I am so hoping that his is a joke article:

https://www.dailykos.com/stories/2022/1/24/2073672/-The-Webb-Telescope-Has-Fully-Unfolded-But-There-are-Problems


One way you can tell it's not real, is they would have used more fuel than they did had flumpy been launched.

And that's without noticing the snark tag.
 
2022-01-25 1:35:24 PM  

erik-k: Lsherm: Fingers still crossed! The calibration is supposed to take two months and I'm farking hoping they don't get a stuck motor or something on any of the mirrors. But if they do, I want to name the uncooperative mirror "Billy."

/I have my reasons
//you know them, Billy.

All of the actuators have already completed a half-inch move out from their launch positions, so that should be good. The radius-of-curvature adjustment I don't know if they've tested.


They actually knew they had two bad motor sensors during testing but it would have cost too much time and money to replace them, so they've already figured out a workaround (per Scott Manley).
 
2022-01-25 1:44:55 PM  

I am Tom Joad's Complete Lack of Surprise: erik-k: Lsherm: Fingers still crossed! The calibration is supposed to take two months and I'm farking hoping they don't get a stuck motor or something on any of the mirrors. But if they do, I want to name the uncooperative mirror "Billy."

/I have my reasons
//you know them, Billy.

All of the actuators have already completed a half-inch move out from their launch positions, so that should be good. The radius-of-curvature adjustment I don't know if they've tested.

They actually knew they had two bad motor sensors during testing but it would have cost too much time and money to replace them, so they've already figured out a workaround (per Scott Manley).


Plus there was a concern that replacing them would have created more problems.  In a case like this, follow the Path of Least Risk.
 
2022-01-25 2:10:44 PM  

Tannhauser: Holy shiat didn't know it went out that far! Can't wait to see the pics


Yeah.  It's trying to look back as close to the beginning of our universe as it can.  I was, I'll admit, a little disappointed when I first heard that it was designed to work in Infrared.  That's because I was thinking that IR images tend to be fuzzy and low resolution compared to visible light.  Shows you how little I understood at the time.

Then I found out the whole story, and if you're interested in this stuff at all, it's fascinating.

So they're trying to look back as close to the Big Bang as possible.  The light (normal, visible light) from the Webb's intended targets has been traveling on its way to us for a *VERY* long time.  You might have heard that the universe is expanding?  Not only are things moving away from us - Space *itself* is expanding!  That is, two things just sitting there relatively motionless get farther apart *because the space between them is expanding*!  How weird is that?

So it seems that this expansion of space affects this primordial light that the Webb is trying to capture.  As it travels toward us through the expanded space, the light gets stretched out to longer wavelengths.  That is, it gets 'downshifted' from visible light to infrared.  So *that* is what the Webb is designed to pick up.

And since infrared light manifests as heat, and since inverse-square law means that the signals Webb wants to capture are farking incredibly weak, any heat at all on the telescope or its instruments could swamp what they're trying to see.  It would be like trying to look at and analyze a firefly while someone is shining an arc light in your eyes.

And *THAT* is why the Webb has that fancy sunshield and orbits where it is.  To keep (as much as possible with our current engineering) any heat from the Sun - or from Earth! - away from those frosty freezy instruments.
 
2022-01-25 2:43:27 PM  
I am Tom Joad's Complete Lack of Surprise:

They actually knew they had two bad motor sensors during testing but it would have cost too much time and money to replace them, so they've already figured out a workaround (per Scott Manley).

Get on them bad motor sensors and ride!
 
2022-01-25 3:25:34 PM  

Nicholas D. Wolfwood: And *THAT* is why the Webb has that fancy sunshield and orbits where it is.  To keep (as much as possible with our current engineering) any heat from the Sun - or from Earth! - away from those frosty freezy instruments.


Add to that the target temps inside the instruments are only 7 Kelvin.... That's 7 degrees above absolute 0. Not bad for our tiny meat brains.

Inside JWST is going to be the coldest place in the solar system.
 
2022-01-25 3:36:22 PM  

khitsicker: Nicholas D. Wolfwood: And *THAT* is why the Webb has that fancy sunshield and orbits where it is.  To keep (as much as possible with our current engineering) any heat from the Sun - or from Earth! - away from those frosty freezy instruments.

Add to that the target temps inside the instruments are only 7 Kelvin.... That's 7 degrees above absolute 0. Not bad for our tiny meat brains.

Inside JWST is going to be the coldest place in the solar system.


... Jubal says "No, that would be the cavity where my ex's heart is supposed to be".
 
2022-01-25 6:25:46 PM  
Webb's orbit will keep the telescope in line with Earth as our planet orbits the sun. This alignment protects the telescope from the heat released by the sun, Earth and even the moon.


I don't think that's right.
 
2022-01-25 9:00:40 PM  

khitsicker: Inside JWST is going to be the coldest place in the solar system.


Not even close. Liquid helium boils at 4K and it's commonly used to cool superconducting magnets e.g. in MRI scanners. Physics labs get down to microkelvin or nanokelvin temperatures.

https://news.mit.edu/2003/cooling
 
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