More Milky Way-like galaxies have been spotted by scientists in early cosmos, advancing our understanding of how galaxies came into being

Mizzou researchers are peering into the past and revealing new clues about the early cosmos. Since light takes a very long time to travel through space, they have the opportunity to see how galaxies looked billions of years ago.In a brand new study, University of Missouri researchers have learnt that spiral galaxies were far more common in the early cosmos than previously thought. The work appears in an open access express scientific journal,The Astrophysical Journal Letters.

“Scientists formerly believed most spiral galaxies developed around 6 to 7 billion years after the universe formed,” said co-author on the study YichengGuo (an associate professor in Mizzou’s Department of Physics and Astronomy). “However, our study shows spiral galaxies were already prevalent as early as 2 billion years afterward. This means galaxy formation happened more rapidly than we previously thought.”

This insight could help researchers develop a superior understanding of how spiral galaxies like the Milky Way (Earth’s home galaxy) formed over time.”Knowing when spiral galaxies formed in the universe has been a popular question in astronomy because it helps us understand the evolution and history of the cosmos,” said Vicki Kuhn (a graduate student in Mizzou’s Department of Physics and Astronomy who led the study).”Many theoretical ideas exist about how spiral arms are formed, but the formation mechanisms can vary among different types of spiral galaxies. This new information helps us better match the physical properties of galaxies with theories—creating a more comprehensive cosmic timeline.”

Using recent pictures from NASA’s James Webb Space Telescope (JWST), the researchers found out that almost 30% of galaxies have a spiral structure about 2 billion years post the formation of universe. The discovery provides a major update to the cosmos’s origin story as previously told using data from Hubble Space Telescope of NASA.

Studying faraway galaxies with JWST gives Kuhn,Guoand other researchers an opportunity to solve a cosmic puzzle by determining the connotation of each clue.”Using advanced instruments such as JWST allows us to study more distant galaxies with greater detail than ever before,” Guostated. “A galaxy’s spiral arms are a fundamental feature used by astronomers to categorize galaxies and understand how they form over time. Even though we still have many questions about the universe’s past, analyzing this data helps us uncover additional clues and deepens our understanding of the physics that shaped the nature of our universe.”