Comments on: James Webb, sealed for freshness… https://habitablezone.com/2016/12/02/james-webb-sealed-for-freshness/ Tue, 07 Apr 2026 19:18:10 -0700 hourly 1 http://wordpress.org/?v=3.3.1 By: RobVG https://habitablezone.com/2016/12/02/james-webb-sealed-for-freshness/#comment-37765 RobVG Sun, 04 Dec 2016 19:43:46 +0000 https://www.habitablezone.com/?p=60593#comment-37765 A long time ago, I had a question about galaxy formation. Ectoterrestrial said we'll start to see answers as soon as the JWST comes online. Fingers crossed.... Thanks for the links. A long time ago, I had a question about galaxy formation. Ectoterrestrial said we’ll start to see answers as soon as the JWST comes online. Fingers crossed….

Thanks for the links.

]]> By: RL https://habitablezone.com/2016/12/02/james-webb-sealed-for-freshness/#comment-37764 RL Sun, 04 Dec 2016 06:31:29 +0000 https://www.habitablezone.com/?p=60593#comment-37764 Don't be silly, they simply said - very loudly- that they would build an incredible wall against thermal radiation, and that the sun would pay for it... Any time it was pointed out that that wasn't really a good plan, they just said it again louder, and asserted the thermal wall just got 10 times better... I am sure it will be fine, because that is apparently the way the world works now, isn't it? Here is how it works in the real world: https://www.nasa.gov/mission_pages/webb/news/miri-test.html https://www.youtube.com/watch?v=PVAe9Ovca5Q <iframe width="560" height="315" src="https://www.youtube.com/embed/PVAe9Ovca5Q" frameborder="0" allowfullscreen></iframe> https://www.nasa.gov/feature/goddard/2016/the-complex-material-engineering-of-nasas-webb-telescope-sunshield https://www.nasa.gov/content/james-webb-space-telescope-sunshield-test-unfolds-seamlessly A LOT of testing goes into everything- it is very hard to simulate on the ground how every part will behave with the others when subjected to a rocket launch, zero-g and the extreme temperatures in space... They even cooled the heart of the telescope to cryogenic temperatures: http://phys.org/news/2015-10-james-webb-telescope-science-instruments.html https://www.sciencerecorder.com/news/2014/10/22/nasas-james-webb-telescope-emerges-unscathed-after-116-days-of-deep-freeze-testing/ Don’t be silly, they simply said – very loudly- that they would build an incredible wall against thermal radiation, and that the sun would pay for it…

Any time it was pointed out that that wasn’t really a good plan, they just said it again louder, and asserted the thermal wall just got 10 times better…

I am sure it will be fine, because that is apparently the way the world works now, isn’t it?

Here is how it works in the real world:
https://www.nasa.gov/mission_pages/webb/news/miri-test.html

https://www.youtube.com/watch?v=PVAe9Ovca5Q

https://www.nasa.gov/feature/goddard/2016/the-complex-material-engineering-of-nasas-webb-telescope-sunshield

https://www.nasa.gov/content/james-webb-space-telescope-sunshield-test-unfolds-seamlessly

A LOT of testing goes into everything- it is very hard to simulate on the ground how every part will behave with the others when subjected to a rocket launch, zero-g and the extreme temperatures in space…

They even cooled the heart of the telescope to cryogenic temperatures:
http://phys.org/news/2015-10-james-webb-telescope-science-instruments.html

https://www.sciencerecorder.com/news/2014/10/22/nasas-james-webb-telescope-emerges-unscathed-after-116-days-of-deep-freeze-testing/

]]> By: RobVG https://habitablezone.com/2016/12/02/james-webb-sealed-for-freshness/#comment-37763 RobVG Sun, 04 Dec 2016 01:04:26 +0000 https://www.habitablezone.com/?p=60593#comment-37763 If all the "unfurling" has been tested in Earth's gravity, you'd assume it would be a piece of cake in Zero-G? If all the “unfurling” has been tested in Earth’s gravity, you’d assume it would be a piece of cake in Zero-G?

]]> By: RL https://habitablezone.com/2016/12/02/james-webb-sealed-for-freshness/#comment-37759 RL Fri, 02 Dec 2016 23:01:22 +0000 https://www.habitablezone.com/?p=60593#comment-37759 Here is all that Webb has to do perfectly in order to work... https://www.youtube.com/watch?v=bTxLAGchWnA <iframe width="560" height="315" src="https://www.youtube.com/embed/bTxLAGchWnA" frameborder="0" allowfullscreen></iframe> Here is all that Webb has to do perfectly in order to work…
https://www.youtube.com/watch?v=bTxLAGchWnA

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