We've never seen a neighboring galaxy like this before.
at 8.0 microns. Spitzer was a pioneer in its day in generating high-resolution images of the near- and mid-infrared universe, but Webb is much more powerful.
Spitzer did"amazing things," Evans said, but he noted that observatory was limited by its spatial resolution, as it was optimized for wide-field surveys that capture celestial objects in context. By comparison, Webb's detailed, close-up perspective will provide"an amazing view of the processes in a different galaxy for the first time, cutting through the dust," Evans said."We're using the mid-infrared to look through the material that otherwise would be obscured at visible wavelengths."
In addition, Webb has a much larger primary mirror, improved detectors and a superior observation point when compared with Spitzer; the now-retired telescope used to operate in an Earth-trailing orbit, as opposed toat Earth-sun Lagrange point 2, about 930,000 miles away. These factors will allow the new telescope to access infrared information with more clarity than its predecessor.
The James Webb Space Telescope will be able to see the first stars and galaxies that emerged in the universe after the Big Bang.
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