A team of scientists have used the James Webb Space Telescope to locate water vapor around a main-belt comet for the first time.
Thisindicates that “water ice from the primordial solar system can be preserved in that region.” The new observations may help reveal where water on Earth came from, answering one of the biggest questions of all: how Earth became host to so much life.
“Our water-soaked world, teeming with life and unique in the universe as far as we know, is something of a mystery — we’re not sure how all this water got here. Understanding the history of water distribution in the solar system will help us to understand other planetary systems, and if they could be on their way to hosting an Earth-like planet,” says Stefanie Milam, Webb deputy project scientist for planetary science and co-author of the study reporting the new finding..
“This image of Comet 238P/Read was captured by the NIRCam instrument on NASA’s James Webb Space Telescope on September 8, 2022. It displays the hazy halo, called the coma, and tail that are characteristic of comets, as opposed to asteroids. The dusty coma and tail result from the vaporization of ices as the Sun warms the main body of the comet.” | Credits: NASA, ESA, CSA, M. Kelley . Image processing: H. Hsieh , A.
“Typically, carbon dioxide makes up about 10 percent of the volatile material in a comet that can be easily vaporized by the Sun’s heat. The science team presents two possible explanations for the lack of carbon dioxide. One possibility is that Comet Read had carbon dioxide when it formed but has lost that because of warm temperatures,” explains NASA.
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James Webb telescope discovers ancient 'water world' in nearby star systemBriley Lewis (she/her) is a freelance science writer and Ph.D. Candidate/NSF Fellow at the University of California, Los Angeles studying Astronomy & Astrophysics. Follow her on Twitter briles_34 or visit her website www.briley-lewis.com.
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