This is part of a long article on the James Webb Space Telescope.
the James Webb Space Telescope, named after a former administrator of Nasa, is not going to repeat the science carried out by its predecessor. While Hubble gazed at the Universe in optical and ultra-violet wavelengths, JWST will look primarily in the infrared.
JWST's primary mirror will be 6.6m (22ft) in diameter, compared with Hubble's 2.4m (7.9ft) mirror.
The telescope is due to launch on a European Ariane 5 from Kourou in 2013. With its tennis court-sized sunshield and huge mirror, JWST is so big it has to be folded up to get it into the rocket fairing.
http://news.bbc.co.uk/2/hi/science/nature/6254991.stm