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James Webb Space Telescope (JWST)
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Here's a time-lapse of today's #JWST excitement - rare view of our shiny, golden mirrors rotating to the vertical:
https://www.youtube.com/watch?v=3LdZ_NftIh8

Thanks to NASA Goddard/Francis Reddy for the video.
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When did the first stars and galaxies form? Actress Alia Shawkat narrates this video about light in the early universe: https://www.youtube.com/watch?v=tSO8evHlafA 
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Stunning new images of #JWST's gold-covered mirrors. Read more: http://go.nasa.gov/1NU2rLl  #mirrorseason

Image credit: NASA/Chris Gunn
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Engineers have constructed a full-scale, flight-like test model, or twin, of the core of James Webb Space Telescope to test its ability to regulate its core body temperature to the correct specifications.
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Yong Xiong's profile photo
 
Sir, I want to ask when will you launch the JWST? Looking forward to it!
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#‎JWST‬'s flight instruments recently completed a months-long super-cold test. Watch on YouTube: https://youtu.be/sui1FDbSYFs Read more: http://go.nasa.gov/1VRR5y0
Vital parts of the James Webb Space Telescope have endured their last super-cold test and now join the observatory's mirrors in a clean room at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
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We like to be able give you cell phone video and pics for "in the moment" coverage - but it's no substitute for what our awesome professional photographers and videographers do! Check out this beautiful time-lapse of #JWST's secondary mirror support structures deploying in our cleanroom at NASA Goddard. You can see the gold-coating of the secondary mirror (which is what our primaries look like under their protective covers). Also, this is the configuration the telescope will be in, out in space. https://youtu.be/f3DGb0sJVk0
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Wooow" Amazing!
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This photo shows the first time that the optically complete telescope (18 primary mirror segments, the secondary mirror, and the Aft Optics Subsystem which contains the tertiary mirror) was placed in a deployed configuration. A series of metrology test will be performed in this configuration, then the secondary mirror support structure will be stowed again.

Credit: NASA/Chris Gunn
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Engineers take a close look at #JWST's primary mirror at NASA Goddard in this new image shot by our photographer Chris Gunn.

The secondary mirror is the round mirror located at the end of the long booms, which are folded into their launch configuration. The team is prepping to rotate the telescope so the instrument module can be installed behind the primary mirror. 

Credit: NASA/Chris Gunn
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Here's a view from overhead of the golden James Webb Space Telescope, with its secondary mirror booms stowed. This is the position the secondary mirror will be in during launch. Preparations are being done to rotate the telescope in order to install the flight instrument module behind the primary mirror.

JWST's mirrors are covered in a microscopically thin layer of gold, which optimizes them for reflecting infrared light, which is the primary wavelength of light this telescope will observe.

Image credit: NASA/Chris Gunn
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Cant wait for its views on the universe 
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#JWST is a part of the OPSPARC #STEM challenge for students. View and vote on their spinoff tech projects: http://www.nasa.gov/press-release/goddard/2016/nasa-announces-public-voting-for-optimus-prime-spinoff-promotion-and-research
The Strategic Partnerships Office at NASA's Goddard Space Flight Center in Greenbelt, Maryland, announces that the public voting portion of OPSPARC 2016 is open as of April 19, 2016. More than 800 students from across the U.S. participated in this year’s OPSPARC, and NASA is asking for the public’s help in determining the winners for 2016.
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Read about our recent #JWST mirror and instrument milestones: http://go.nasa.gov/1WCBm44
NASA's James Webb Space Telescope just got a little closer to launch with the completion of cryogenic testing on its science cameras and spectrographs and the installation of the final flight mirrors.
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Beautiful. 
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NASA is partnering with the Space Telescope Science Institute (STScI) and the Northrop Grumman Corporation to highlight the James Webb Space Telescope at South by Southwest (SXSW) from March 13 to 19, 2016.
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All about the next generation James Webb Space Telescope!
Introduction

The James Webb Space Telescope is the successor to Hubble. It is an infrared telescope with a 6.5m mirror and a sunshade the size of a regulation tennis court! It will launch in 2018.