NASA has successfully completed building its largest space telescope, which will be 100 times more powerful than the Hubble probe and may find the first galaxies that formed in the early universe. The James Webb Space Telescope will be the successor to NASA's 26-year-old Hubble Space Telescope. <br/><br/>The Webb telescope's infrared cameras are so sensitive that it needs to be shielded from the rays of the Sun. A 5-layer sunshield of the size of a tennis court will prevent the background heat from the Sun from interfering with the telescope's infrared sensors.