James Webb Space Telescope model in Washington

This NASA handout photo released May 10, 2007 shows James Webb Space Telescope. NASA displayed a full scale model of the two-storey high James Webb Space Telescope in Washington. The Webb telescope, the next generation space telescope of the Hubble Space Telescope, is expected to be launched in 2013. (Xinhua Photo)

Visitors look at a full scale model of the two-storey high James Webb Space Telescope in Washington, May 10, 2007. The Webb telescope, the next generation space telescope of the Hubble Space Telescope, is expected to be launched in 2013. (Xinhua Photo)