Astronomers Identify Star Formation Boundary in Milky Way, Raising New Questions
Astronomers have discovered that star formation in the Milky Way's spiral disk is confined to a region extending up to 40,000 light-years from the galactic center. This finding, led by Karl Fiteni of the University of Insubria, was achieved by analyzing data from the LAMOST telescope in China, the Apache Point Observatory Galactic Evolution Experiment in the U.S., and the European Space Agency's Gaia mission. The study reveals that beyond this boundary, stars are generally older, with the oldest stars located both at the center and the edge of the Milky Way's disk. The research suggests that the efficiency of star formation drops significantly beyond this 40,000 light-year radius, marking the edge of the star-forming region.