FILE - In this Oct. 3, 2006 file photo, Nobel Prize for Physics winner John Mather speaks at a news conference at NASA headquarters in Washington. Mather, the senior project scientist for NASA's James Webb Space Telescope, which is planned for launch into space in 2021, said the space-based instrument will be extremely effective at gathering infrared light and will help compensate for the advantage that Hawaii's Mauna Kea has over the backup site on La Palma, Spain. (AP Photo/Kevin Wolf, File)