Webb Space Telescope

[ryanosaur]

Getting back to the topic:

James Webb Space Telescope is nearly halfway through its mirror alignment stages

NASA recently completed the third of seven planned steps to align the 18 hexagonal segments of Webb's mirror, marking nearly the halfway point in a complex, weeks-long process.

www.space.com

 

[SithZedi]

Thor's Helmet head...

https://twitter.com/i/web/status/1497766323442442241

 

[ryanosaur]

Ever closer...

New James Webb Space Telescope photo showcases single star in key mission milestone

The observatory's view of the universe is coming together.

www.space.com

 

[CajunLB]

oh yes agree ... I seen it too and was completely blown away ... it is impossible to believe the sheer size, until you see it ..... incredibly massive

That’s what she said.

 

[Pogre]

Ever closer...

New James Webb Space Telescope photo showcases single star in key mission milestone

The observatory's view of the universe is coming together.

www.space.com

View attachment 54613

Dr Becky is stoked! She has that same image up on her monitor, lol.

 

[ryanosaur]

Dr Becky is stoked! She has that same image up on her monitor, lol.

I was hoping we'd see a close up of the main Test Star again... but then they went and turned it on some other unsuspecting galactic neighborhood and started stealing their un-visible light!

 

[ryanosaur]

James Webb Space Telescope completes another stage of instrument alignment

There's only one step left to tackle.

www.space.com

 

[Out-Of-Phase]

Final James Webb Space Telescope instrument reaches super-cold operating temperature

'We spent years practicing for that moment,' team member says of rapidly completing instrument calibration.

www.space.com

Almost absolute zero.

 

[haraldo]

Final James Webb Space Telescope instrument reaches super-cold operating temperature

'We spent years practicing for that moment,' team member says of rapidly completing instrument calibration.

www.space.com

Almost absolute zero.

There’s some pressure here

 

[haraldo]

I was hoping we'd see a close up of the main Test Star again... but then they went and turned it on some other unsuspecting galactic neighborhood and started stealing their un-visible light!

That picture is way cool

 

[mtrycrafts]

Dark current. Do we need to be worried about it when we watch movies?
Wow, unreal.

 

[ryanosaur]

Dark current.

Sounds like a Skin-emax flick. Do they still do those? (Asking for @Pogre .)

 

[mtrycrafts]

Well, that was not a made up thing on my part.
I read that article in the link:

"MIRI's cool temperatures are also required to overcome what scientists call "dark current," or the electrical current created by vibrating atoms in the detectors. These small movements can generate false signals in the instrument's data, marring observations. "

 

[ryanosaur]

Well, that was not a made up thing on my part.
I read that article in the link:

"MIRI's cool temperatures are also required to overcome what scientists call "dark current," or the electrical current created by vibrating atoms in the detectors. These small movements can generate false signals in the instrument's data, marring observations. "

I know. I read about it too. But there’s gotta be something to talk about until we start snapping peeping Tom photos of naked alien babes at the edge of space-time!

 

[mtrycrafts]

I know. I read about it too. But there’s gotta be something to talk about until we start snapping peeping Tom photos of naked alien babes at the edge of space-time!

I can just imagine atomic motion almost comes to a standstill at those temperatures. Resistance must be nill.
Wonder how they tested the equipment if it could withstand such low, near zero temp.

 

[ryanosaur]

I can just imagine atomic motion almost comes to a standstill at those temperatures. Resistance must be nill.
Wonder how they tested the equipment if it could withstand such low, near zero temp.

Supercomputers.

 

[haraldo]

Well, that was not a made up thing on my part.
I read that article in the link:

"MIRI's cool temperatures are also required to overcome what scientists call "dark current," or the electrical current created by vibrating atoms in the detectors. These small movements can generate false signals in the instrument's data, marring observations. "

Is that something we need to worry about?
Well, temperature in my living room is slightly above what's on James Webb Telescope

 

[haraldo]

I can just imagine atomic motion almost comes to a standstill at those temperatures. Resistance must be nill.
Wonder how they tested the equipment if it could withstand such low, near zero temp.

Thre must be lots of real life testing here

 

[mtrycrafts]

Is that something we need to worry about?
Well, temperature in my living room is slightly above what's on James Webb Telescope

Oh, good. I was worried there for a few minutes.

 

[ryanosaur]

According to a post yesterday, the JWST’s mirrors are the final item waiting to cool to their operating temperature. All other instruments have cooled to mission parameters.
While it was not said, I would expect that final calibration of all systems will be dependent on achieving this last benchmark.