James Webb Space Telescope Mirrors (JWST) - Testing of the JWST's mirrors: Six of the...

James Webb Space Telescope Mirrors (JWST) - Testing of the JWST's mirrors: Six of the 18 JWST (James Webb Space Telescope) mirrors seen at Nasa's Marshall Space Center. These mirrors will be tested there to ensure they will resist the extreme temperatures of space vacuum. The JWST will replace the Hubble Space Telescope in 2018. Equipped with a 6.5 m mirror, he will observe the universe mainly in infrared - Space Telescope's primary mirror segments are prepared to begin final cryogenic testing at Nasa's Marshall Space Flight Center in Huntsville, Ala. This represents the first six of 18 segments that will form Nasa's James Webb Space Telescope's primary mirror for space observations. Engineers began final round-the-clock cryogenic testing to confirm that the mirrors will respond as expected to the extreme temperatures of space prior to integration into the telescope's permanent housing structure