New images from the James Webb Space Telescope revealed the ages of hundreds of galaxies surrounding ours.
), clumps, irregulars, or some combination of the three. The data was all analyzed by hand, with astronomers sifting through each and every file. “One thing I love about this paper is how human it is,” says Metha. He explains how a century ago, American astronomerused the Mount Wilson Observatory in California to sort different types of nearby galaxies, creating the classification system most astronomers use today.
This image—a mosaic of 690 individual frames taken with the Near Infrared Camera on the James Webb Space Telescope—covers an area of sky about eight times as large as Webb’s First Deep Field Image released on July 12. It’s from a patch of sky near the handle of the Big Dipper. This is one of the first images obtained by the Cosmic Evolution Early Release Science Survey collaboration. It contains several examples of high redshift galaxies with various morphologies.
“We see all sorts of structures across cosmic time less than a billion years after the Big Bang,” says, an astronomer at UT Austin. These new images, she said, “demonstrate what we are able to do with JWST and hint at a universe that hosted evolved galaxies earlier than we thought.” The fact that there was such a variety of galaxies while the universe was still young is puzzling, and sure to keep astronomers busy as they build better models to learn how these cosmic entities formed and grew. The study also shows that to see the first galaxies, experts will need to keep rewinding that tape, and pushing the boundaries of how far back JWST can peer into the universe’s past.
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