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(NASA)   The launch of the James Webb Space Telescope is two years away... and always will be   ( nasa.gov) divider line
    More: Obvious  
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1029 clicks; posted to Geek » on 29 Sep 2017 at 11:40 AM (11 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2017-09-29 12:16:40 PM  
6 votes:

bigfatbuddhist: I am SO looking forward to this...


I am going to be so farking worried on launch day up to and until that thing is unfolded and operational.
2017-09-29 01:30:59 PM  
5 votes:
I've actually done some work on space instruments, and watching the JWST deployment sequence gives me massive anxiety. There are...not a small number of steps to unfold the damn thing. JWST's is an amazing mission and I'm obviously rooting for NASA to pull it off, but if JWST fails, I suspect it will imperil NASA in a way we've never seen before.

JWST Deployment Sequence
Youtube dlJtO7EbK-U
2017-09-29 12:07:14 PM  
5 votes:

jaytkay: I can't wrap my mind around the folding needed to fit into the rocket. The package in the Ariane rocket is 15 feet wide (and 53 feet long). Then it unfolds to this:
[upload.wikimedia.org image 640x425]



Like this:
 
The James Webb Space Telescope Folds Up (animation)
Youtube 30Lv8JjCqhU
2017-09-29 01:04:20 PM  
4 votes:
During hurricane Harvey, a dedicated crew of NASA employees stayed on-site to continue the thermal-vacuum testing for the Webb and keep it on schedule as best they could. The integration testing is taking a bit longer but it is necessary. Unlike the Hubble, we can't fix the Webb once it is on-orbit.
2017-09-29 11:49:25 AM  
3 votes:
It's called time dilation, duh. We may never know what happens beyond the James Webb space telescope event horizon.
2017-09-29 06:56:29 PM  
1 vote:

southernmanblog: Some of my colleagues are astrophysicists who have some involvement in this project. They are unanimously furious at the original JWT team, who they accuse of deliberately low-balling both cost and construction time estimates and hoping that once they got the initial funding that the government wouldn't cancel it.


Remind your colleagues that the original JWT team did the right thing, because if they hadn't low-balled the cost and time estimates, the damn thing wouldn't have been approved in the first place.

"We need something better than Hubble."
"But Hubble can see forever. How much does better cost?"
"Um... a billion and a half?"
"OK, that's do-able. We were worried you were gonna say ten billion. That would have been way too much for a nerd telescope."
2017-09-29 06:48:22 PM  
1 vote:
From Wikipedia: "In June 2011, it was reported that the Webb telescope would cost at least four times more than originally proposed, and launch at least seven years late..."

Some of my colleagues are astrophysicists who have some involvement in this project. They are unanimously furious at the original JWT team, who they accuse of deliberately low-balling both cost and construction time estimates and hoping that once they got the initial funding that the government wouldn't cancel it.
2017-09-29 12:13:08 PM  
1 vote:

Sgt. Expendable: I remember being in middle school and reading about how this thing was going to launch in 2008.


Congress dicking around with NASA funding - How does it work?
2017-09-29 11:38:13 AM  
1 vote:
I am SO looking forward to this...
 
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