New research sheds light on how young stars transform their galaxies. Using data from the James Webb Space Telescope, Hubble Space Telescope, and the Atacama Large Millimeter/submillimeter Array, astronomers examined roughly 18,000 star-forming regions in nearby spiral galaxies.
The findings stem from the PHANGS survey, a major collaborative effort to understand galactic evolution. This work reveals the mechanisms by which stellar activity influences the structure and chemistry of galaxies over cosmic time.
Researchers focused on how radiation and outflows from young stars heat and push surrounding gas. These processes regulate star formation and shape the interstellar medium, offering clues about how galaxies evolve from chaotic, gas-rich systems into more orderly structures.
Implications extend to our understanding of galaxy life cycles. By showing that young stellar activity is a primary driver of change, the study challenges models that attribute galactic evolution mainly to larger-scale events like mergers or supermassive black hole feedback.
Experts say this detailed, multi-observatory approach could refine simulations of galaxy formation. Future work may integrate these observations to predict how the Milky Way and its neighbors will change over billions of years.