![]() Then, they combined spectra from 23 of those galaxies. In order to make these discoveries, Strom and her collaborators used the JWST to observe 33 distant teenaged galaxies for 30 straight hours. “Teenagers often have experiences that determine their trajectories into adulthood. “Using the JWST, our program targets teenage galaxies when they were going through a messy time of growth spurts and change,” Northwestern’s Allison Strom, who led the study, said in a media statement. The results showed that these so-called teenage galaxies go through an uncomfortable growth spurt during their teenage years, similar to humans. In the study, a group of scientists at Northwestern University analyzed the results from the CECILIA (Chemical Evolution Constrained using Ionized Lines in Interstellar Aurorae) Survey, which used NASA’s James Webb Space Telescope (JWST) to study the chemistry of faraway galaxies. Want more health and science stories in your inbox? Subscribe to Salon's weekly newsletter Lab Notes. Either way, just like humans, galaxies go through different stages of maturation.Ī separate study published in The Astrophysical Journal Letters highlights unexpected observations in “teenage galaxies,” meaning galaxies that formed two-to-three billion years after the Big Bang. Others believe that our galaxy might have matured earlier than previously thought. A leading theory is that the Milky Way's collision with a dwarf galaxy nearly 10 billion years ago was a turning point, setting in motion the changes that amounted to our modern galaxy. However, what happened during each stage of its evolution, and how long those phases lasted to get to its current form today, remains unclear. (Dr Till Sawala)Astronomers believe the Milky Way is an estimated 13.51 billion years old. “Further, the simulation shows that our standard model of the Universe, based on the idea that most of its mass is cold dark matter, can reproduce the most remarkable structures in the Universe, including the spectacular structure of which the Milky Way is part.”ĭistribution of the brightest galaxies in the Local Universe, observed in the 2MASS survey (left panel) and reproduced in the SIBELIUS simulation (right panel). “It is rare but not a complete anomaly: our simulation reveals the intimate details of the formation of galaxies such as the transformation of spirals into ellipticals through galaxy mergers,” co-author Professor Carlos Frenk said in a media statement. ![]() The researchers said the final simulation was consistent with observations of our universe through telescopes. Through this simulation they tracked the evolution of the universe over 13.8 billion years, from the early universe to today. The team of researchers landed on their conclusion using the SIBELIUS (Simulations Beyond the Local Universe) supercomputer simulation. "Our simulation reveals the intimate details of the formation of galaxies such as the transformation of spirals into ellipticals through galaxy mergers."
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