article_snippet.sent: Pictured are Nasa scientists completing a series of cryogenic tests on six James Webb Space Telescope beryllium mirror segments .
article_snippet.sent: JWST's main mirror will be 21ft (6.5 metres) in diameter, three times as large as Hubble's .
article_snippet.sent: Inside a massive room that is partially closed off from view, in clean room where no dust can harm Telescope, a team of engineers dressed in white, resembling surgeons, work on building JWST.
article_snippet.sent: JWST's main mirror will be 21ft (6.5 metres) in diameter, three times as large as Hubble's.
article_snippet.sent: A joint project of Nasa, the European and canadian space agencies, JWST will carry four instruments, including cameras and spectrometers that can capture extremely faint signals.
article_snippet.sent: Infra-red capability will help Infra-red capability observe distant celestial bodies, and Infra-red capability camera shutter will be able to remain open for long periods, explained Matt Greenhouse, JWST project scientist for the science instrument payload. '
article_snippet.sent: JWST is expected to propel that research even further. '
article_snippet.sent: Unlike the Hubble Space Telescope, which circles the Earth, JWST will go even further, to a place called L2, for LaGrange Point, 930,000 miles (1.5 million km) away in space.
article_snippet.sent: Unlike the Hubble Space Telescope, which circles the Earth, JWST will go even further, to a place called L2, for LaGrange Point, 930,000 miles (1.5 million km) away in space .