James Webb Space Telescope, information, updates and discussion |
James Webb Space Telescope, information, updates and discussion |
Aug 23 2005, 02:01 PM
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#101
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Member Group: Members Posts: 134 Joined: 13-March 05 Member No.: 191 |
The manufacture of the JWST mirror blanks has now been completed.
Despite this milestone, the fate of JWST is still somewhat precarious, because although the scientific bang from the telescope is expected to be huge, the bucks required have increased to a staggering $4.5 billion. A Space.com article on the squeeze in NASA's space-based astronomy plans gives some background. The JWST home page can be found here. The Space Telescope Science Institute, which runs Hubble, also has a site here. As does ESA. |
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Jan 4 2022, 07:10 PM
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#102
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Junior Member Group: Members Posts: 51 Joined: 31-December 10 From: Earth Member No.: 5589 |
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Jan 5 2022, 09:48 AM
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#103
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Junior Member Group: Members Posts: 39 Joined: 9-August 12 From: London, UK Member No.: 6521 |
Finding this part of the mission very engaging but at the same time very tense given the impossibility of fixing anything that goes wrong! There's a lot of coverage on this but little detail - does anyone know of any documents with detailed arrangement of the wires and pulleys they keep talking about for the sunshield? TIA |
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Jan 5 2022, 07:48 PM
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#104
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
does anyone know of any documents with detailed arrangement of the wires and pulleys they keep talking about for the sunshield? I spent some time looking at the NASA Tech Report Server but didn't really find anything that had a lot of detail about the sunshield (AKA sunshade). It may be that because it's a somewhat separate system designed largely by a subcontractor, the usual publication paths don't apply. https://ntrs.nasa.gov/api/citations/2020000...20200001556.pdf is a very high-level discussion but has no satisfying details and there are no references to anything about the sunshade, though it mentions a 1/3-scale test model of it. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jan 6 2022, 01:52 AM
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#105
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Junior Member Group: Members Posts: 43 Joined: 13-June 08 Member No.: 4206 |
I spent some time looking at the NASA Tech Report Server but didn't really find anything that had a lot of detail about the sunshield (AKA sunshade). I didn't find much if anything about the mechanisms, motors, pulleys, or rigging arrangements either. I did find a paper that talks about the analysis of the behavior of the shield and gossamer structures. http://www.ryanfellini.com/publications/08SS_Fellini.pdf Perhaps more will turn up in time.. Also wondering about re-tensioning the membranes mid-mission, if that's something that can be done, if it needs to be done..? Watched a video, it's spring loaded and self-adjusting over the upcoming years. |
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