Blue galaxies contain stars, but very little dust. Webb’s MIRI image offers a kaleidoscope of colors and highlights where the dust is – a major ingredient for star formation, and ultimately life itself. Stars are also captured with prominent diffraction spikes, as they appear brighter at shorter wavelengths. The powerful gravitational field of a galaxy cluster can bend the light rays from more distant galaxies behind it, just as a magnifying glass bends and warps images. Other features include the prominent arcs in this field. Researchers will soon begin to learn more about the galaxies’ masses, ages, histories, and compositions. The light was stretched by the expansion of the universe to infrared wavelengths that Webb was designed to observe. We are looking back in time to within a billion years after the big bang when viewing the youngest galaxies in this field. Light from these galaxies took billions of years to reach us. Webb’s NIRCam has brought distant galaxies into sharp focus – they have tiny, faint structures that have never been seen before, including star clusters and diffuse features. 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. Webb’s First Deep Field is galaxy cluster SMACS 0723, and it is teeming with thousands of galaxies – including the faintest objects ever observed in the infrared. NASA’s James Webb Space Telescope has delivered the deepest and sharpest infrared image of the distant universe so far. NASA and its partners will release the full series of Webb’s first full-color images and data, known as spectra, Tuesday, July 12, during a live NASA TV broadcast.Webb’s sharp near-infrared view brought out faint structures in extremely distant galaxies, offering the most detailed view of the early universe to date.Webb’s image covers a patch of sky approximately the size of a grain of sand held at arm’s length by someone on the ground – and reveals thousands of galaxies in a tiny sliver of vast universe.President Joe Biden unveiled this image of galaxy cluster SMACS 0723, known as Webb’s First Deep Field, during a White House event Monday, July 11.Known as Webb’s First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail. NASA’s James Webb Space Telescope has produced the deepest and sharpest infrared image of the distant universe to date.
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