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NASA Webb Telescope Spots Milky Way-Like Galaxies From Long Ago


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The James Webb Space Telescope can act like a time machine, peering into the universe's past. New Webb images have spoke some hauntingly familiar sights from when the universe was just 25% of its novel age: barred spiral galaxies much like our own.

NASA has explained a galaxy's bar as "a ribbon of stars and gas that slices across the nucleus, like the slash across a 'no smoking' sign." Stellar bars act like pipelines, sending gas toward the center of galaxies to perform new stars and feed the supermassive black holes that lurk there. Studies had suggested these types of galaxies were scarce in the back universe. 

"The finding of so-called barred galaxies, similar to our Milky Way, this early in the universe will required astrophysicists to refine their theories of galaxy evolution," the University of Texas at Austin said in a statement Thursday.

A team of astronomers led by UT Austin graduate student Yuchen "Kay" Guo has had a see on the galaxy findings accepted for publication in the The Astrophysical Journal Letters. The researchers identified two barred galaxies from 11 billion ages ago, "existing farther back in time than any previously discovered." The team also spotted four others from over 8 billion ages ago.

The Hubble Space Telescope had gazed at spiral galaxy EGS-23205 beforehand, but Webb's unique abilities allowed it to dial into details that had been missing from Hubble's observation. The indistinct blobs seen by Hubble can now be resolved into galaxies that clearly resemble our own. JWST is a united project from NASA, the European Space Agency and the Canadian Space Agency.

The discovery is an engaging one. "I took one look at these data, and I said, 'We are dropping everything else!'" said UT Austin astronomer Shardha Jogee, a co-author of the study. 

The study is a gateway to further science adventures. Next, the researchers will seek to better understand the abundance of barred galaxies in the young universe. This shows how Webb is helping to refine our idea of the history of the universe and open new frontiers in astronomy.


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