Release Date: July 28, 2016 12:00PM (EDT)
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Webb will have a 6.5-meter- (21.6 feet) diameter primary mirror, which would give it a significant larger collecting area than the mirrors available on the current generation of space telescopes. Hubble's mirror is a much smaller 2.4 meters in diameter and its corresponding collecting area is 4.5 square meters, giving Webb around 7 times more collecting area! Webb will have significantly larger field of view than the NICMOS camera on Hubble (covering more than about 15 times the area) and significantly better spatial resolution than is available with the infrared Spitzer Space Telescope.