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James Webb Space Telescope News

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#1
When it is launched in 2018, it will be the world's biggest and most powerful telescope, capable of peering back 200 million years after the Big Bang.
Today, Nasa engineers in Maryland installed the final mirror of the huge device - an important milestone following more than a decade of work.





Using a robotic arm reminiscent of a claw machine, the team meticulously installed all of Webb's primary mirror segments onto the telescope structure.
Each of the hexagonal-shaped mirror segments measures just over 4.2 feet (1.3 meters) across - about the size of a coffee table - and weighs approximately 88 pounds (40kg)



Once in space and fully deployed, the 18 primary mirror segments will work together as one large 21.3ft diameter (6.5 meter) mirror.





The telescope is expected to be 100 times more potent than its predecessor, Hubble, and three times larger.
Webb will study every phase in the history of our universe, including the cosmos' first luminous glows, the formation of solar systems capable of supporting life on planets like Earth, and the evolution of our own solar system.




 
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NASA engineers recently unveiled the giant golden mirror of NASA's James Webb Space Telescope as part of the integration and testing of the infrared telescope.



The 18 mirrors that make up the primary mirror were individually protected with a black covers when they were assembled on the telescope structure. Now, for the first time since the primary mirror was completed, the covers have been lifted.



Standing tall and glimmering gold inside NASA's Goddard Space Flight Center's clean room in Greenbelt, Maryland, this mirror will be the largest yet sent into space. Currently, engineers are busy assembling and testing the other pieces of the telescope.

This widely anticipated telescope will soon go through many rigorous tests to ensure it survives its launch into space. In the next few months, engineers will install other key elements, and take additional measurements to ensure the telescope is ready for space.
 
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#19
That gold! omg gold put to use ,who would of tought gold would be times exponentialy more usefull as a polished coating of mirrors in cosmos rather than the useless human invented "comodity"? (Going on a limb here but here it goes: retarded humas beeing retarded). Had that "brewing".
 

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#21
The James Webb Space Telescope (JWST), expected to launch in 2018, has failed its latest test.

Computer sensors forced the shut-down of a machine during vibration testing to see whether the telescope could withstand the vibration expected during launch.

The telescope, the largest space telescope ever built, was not damaged and vibration tests are expected to resume later in January, Nasa has said.

During the vibration testing on 3 December at Nasa Goddard, accelerometers attached to the telescope detected unexpected responses and the test shut itself down to protect the hardware.




The shut-down came a fraction of a second after a higher-than-expected response was detected at a particular frequency of vibration, about one note lower than the lowest note on a piano.

'Currently, the team is continuing their analyses with the goal of having a review of their findings, conclusions and plans for resuming vibration testing in January,' said Eric Smith, program director for Nasa's James Webb Space Telescope, in Washington.

'This is why we test -- to know how things really are, as opposed to how we think they are,' said Paul Geithner, deputy project manager – technical for the Webb telescope at Nasa's Goddard Space Flight Center in Greenbelt, Maryland.

http://www.ibtimes.com/james-webb-s...lose-identifying-source-dec-3-anomaly-2469366
 

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#22
The James Webb Telescope has completed critical acoustic and vibration tests in a major step toward readying the craft for spaceflight.

These tests at NASA’s Goddard Space Flight Center simulated the shaking and ‘ear-splitting noise’ the telescope will experience during launch.

Next, it will move on to further environmental tests this spring before it is shipped to the Johnson Space Center, where it will be subjected to end-to-end optical testing in a vacuum.




For the vibration tests, the telescope was mounted on a system known as a shaker table, to simulate the vibration that will happen during launch on the Ariane V rocket.

In the test, it was subjected to vibrations ranging from 5 to 100 times per second.

Then, in the acoustic test, the researchers wrapped it in a clean tent and pushed it into the Acoustic Test Chamber, which is closed off by insulated steel doors that are nearly a foot thick.




 

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#24
Nasa has completed its first end-to-end communication between the telescope and its mission operations centre.


The team verified the telescope was recording and transmitting properly to the spacecraft bus, which is currently located at Northrop Grumman Aerospace Systems in Redondo Beach, California.

These communications are required to support its launch and then operate it once it's in orbit.




The ground segment test consisted of two parts—the Space Network (SN) portion and the Deep Space Network (DSN) portion.
The DSN comprises three ground stations, located about 120 longitudinal degrees apart from each other on Earth - one each in Canberra, Madrid, and Goldstone.

The placement of these guarantees the Webb telescope will be able to contact at least one station at all times, to remain in constant communication with Earth.

For this test, the telescope communicated with a specially designed trailer that mimics these ground stations, rather than the ground stations themselves.


Another communications test will take place at the telescope's planned launch site in Kourou, French Guiana, about a month before launch in late 2018.

This test will demonstrate the expected connectivity with the telescope at first contact with it, which will occur approximately three-and-a-half minutes after launch.
 
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