Space & Technology

June 19, 2017
 

Webb Telescope set for testing in space simulation chamber

NASA photograph by Desiree Stover

NASA’s James Webb Space Telescope sits in front of the door to Chamber A, a giant thermal vacuum chamber located at NASA’s Johnson Space Center.  The telescope will soon be moved into the chamber, where it will spend a hot Houston summer undergoing tests at sub-freezing cryogenic temperatures.  The telescope will operate at an extremely cold 39 K (-234° C or -389° F) in space, so NASA is simulating those conditions on the ground, ensuring the optics and instruments will perform perfectly after launch.

In space, the telescope itself must be kept extremely cold, in order to be able to detect the infrared light from faint and very distant objects. To protect the telescope from external sources of light and heat (like the sun, Earth, and moon) as well as from heat emitted by the observatory itself, a five-layer, tennis court-sized sunshield acts like a parasol providing shade. The sunshield separates the observatory into a warm, sun-facing side (reaching temperatures close to 400 degrees Farenheit), and a cold side (185 degrees below zero) where the sunlight is blocked from interfering with the sensitive telescope instruments.

The James Webb Space Telescope is the scientific successor to NASA’s Hubble Space Telescope. It will be the most powerful space telescope ever built. Webb is an international project led by NASA with its partners, ESA (European Space Agency) and the Canadian Space Agency.

For more information about the Webb telescope visit www.jwst.nasa.gov or www.nasa.gov/webb.




All of this week's top headlines to your email every Friday.


 
 

 

Headlines – June 20, 2018

News Thanks to NATO infighting, future of F-35 is shrinking – The U.S. Senate wants to revoke Turkey’s license to buy the jet, while other European governments are looking to get a competitor off the ground.   Trump wants a Space Force. Now what? – On June 18, President Donald Trump ordered the Pentagon to begin...
 
 
Marine Corps photograph by Staff Sgt. T.T. Parish

Next-generation binoculars contribute to battlefield survivability

Marine Corps photograph by Staff Sgt. T.T. Parish A Marine with the 31st Marine Expeditionary Unit’s force reconnaissance platoon waits on the flight deck before low-light fast rope training aboard the USS Bonhomme Richard in...
 
 
Northrop Grumman photograph

Northrop Grumman opens new Illinois facility with ribbon cutting, reception

Northrop Grumman photograph Congressman Raja Krishnamoorthi and Congressman Peter Roskam, alongside Northrop Grumman executives and state and local leaders, celebrate the opening of the newest Northrop Grumman facility in Arlin...