Skyler Ware is a freelance science journalist covering chemistry, biology, paleontology and Earth science. She was a 2023 AAAS Mass Media Science and Engineering Fellow at Science News. Her work has also appeared in Science News Explores, ZME Science and Chembites, among others. Skyler has a Ph.D. in chemistry from Caltech.
JWST spotted ultraviolet light escaping from the ancient galaxy JADES-GS-z13-1 in the earliest evidence yet for the"Era of Reionization."Researchers discovered bright ultraviolet light coming from an ancient, distant galaxy.
The findings, published March 26 in the journal, the universe was a soup of protons, neutrons and electrons. As the universe cooled, the protons and neutrons combined to form positively charged hydrogen ions, which then attracted negatively charged electrons to create a fog of neutral hydrogen atoms. This fog absorbed light with short wavelengths, such as UV light, blocking it from reaching farther into the universe.formed, they emitted enough UV light to knock the electrons back off the hydrogen atoms, allowing UV light out once again. Though this"Era of Reionization" is thought to have ended about a billion years after the Big Bang, scientists still aren't sure exactly when the first stars formed — or when the Era of Reionization began. James Webb telescope reveals 'cosmic tornado' in best detail ever — and finds part of it is not what it seems. The galaxy is so far from Earth that we're observing it as it appeared just 330 million years after the Big Bang. In the JWST data, the scientists spotted bright light at a specific wavelength known as the Lyman-alpha emission, which is produced by hydrogen. Though the light started out as ultraviolet, the universe's expansion over more than 13 billion years has stretched it out into the infrared region, making it visible to JWST's sensors.Get the world’s most fascinating discoveries delivered straight to your inbox.Receive email from us on behalf of our trusted partners or sponsors For the Lyman-alpha emission to reach Earth today, JADES-GS-z13-1 must have ionized enough of the hydrogen gas around it to allow the UV light to escape — something scientists hadn't expected so early in the universe's development. "GS-z13-1 is seen when the universe was only 330 million years old, yet it shows a surprisingly clear, telltale signature of Lyman-alpha emission that can only be seen once the surrounding fog has fully lifted,"'I was astonished': Ancient galaxy discovered by James Webb telescope contains the oldest oxygen scientists have ever seen Researchers still don't know what produced the Lyman-alpha radiation in JADES-GS-z13-1. The light might come from extremely hot and massive early stars, or it might be produced by an early supermassive black hole. "We really shouldn't have found a galaxy like this, given our understanding of the way the universe has evolved," study co-author, an astronomer at the University of Arizona, said in the statement."We could think of the early universe as shrouded with a thick fog that would make it exceedingly difficult to find even powerful lighthouses peeking through, yet here we see the beam of light from this galaxy piercing the veil." Skyler Ware is a freelance science journalist covering chemistry, biology, paleontology and Earth science. She was a 2023 AAAS Mass Media Science and Engineering Fellow at Science News. Her work has also appeared in Science News Explores, ZME Science and Chembites, among others. Skyler has a Ph.D. in chemistry from Caltech.Eclipse map: What will tomorrow's solar eclipse look like from your state? Staring at the March 29 solar eclipse can cause eye damage in seconds — and you won’t even feel it happening 'Woolly devil' flowers in Texas desert are the 1st new plant genus discovered in a US national park in almost 50 years
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