writes "The scale of the delay and cost overrun blighting Nasa's James Webb Space Telescope (JWST) has been laid bare by a panel called in to review the project. The group believes the final budget for Hubble's successor is likely to climb to at least $6.5bn, for a launch that is possible in September 2015. But even this assessment is optimistic, say the panel members. The head of the US space agency has accepted that "cost performance and coordination have been lacking". Charles Bolden has ordered a reorganisation of the project and has changed the management at its top.
Whereas Hubble (space telescope) sees the Universe mostly in visible light, JWST will observe the cosmos at longer wavelengths, in the infrared. It will see deeper into space and further back in time, to the very first population of stars."Link to Original Source