SMACS 0723 can be viewed near the constellation Volans in the southern sky. Among the results, it proves that one of the galaxies has a mirror image. NIRSpec data also demonstrate how detailed galaxy spectra will be with Webb observations.įinally, Webb’s Near-Infrared Imager and Slitless Spectrograph (NIRISS) used Wide-Field Slitless Spectroscopy to capture spectra of all the objects in the entire field of view at once. The data revealed light from one galaxy that travelled for 13.1 billion years before Webb’s mirrors captured it. Webb’s Near Infrared Spectrograph (NIRSpec) microshutter array observed 48 individual galaxies at the same time – a new technology used for the first time in space – returning a full suite of details about each. In addition to taking images, two of Webb’s instruments also obtained spectra – data that reveal objects’ physical and chemical properties that will help researchers identify many more details about distant galaxies in this field. The original data for the image was collected by the Hubble Space Telescope from September 2003 to January 2004. Webb spectrum showcases galaxy’s composition The Hubble Ultra-Deep Field ( HUDF) is a deep-field image of a small region of space in the constellation Fornax, containing an estimated 10,000 galaxies. This field was also imaged by Webb’s Mid-Infrared Instrument (MIRI), which observes mid-infrared light. Much more about this cluster will be revealed as researchers begin digging into Webb’s data. This image shows the galaxy cluster SMACS 0723 as it appeared 4.6 billion years ago, with many more galaxies in front of and behind the cluster. Researchers will continue to use Webb to take longer exposures, revealing more of our vast Universe. ![]() This deep field, taken by Webb’s Near-Infrared Camera (NIRCam), is a composite made from images at different wavelengths, totaling 12.5 hours – achieving depths at infrared wavelengths beyond the Hubble Space Telescope’s deepest fields, which took weeks. ![]() The combined mass of this galaxy cluster acts as a gravitational lens, magnifying more distant galaxies, including some seen when the universe was less than a billion years old. Webb’s image is approximately the size of a grain of sand held at arm’s length, a tiny sliver of the vast universe. Known as Webb’s First Deep Field, this is galaxy cluster SMACS 0723 and it is teeming with thousands of galaxies – including the smallest, faintest objects ever observed.
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