the most stars are concentrated in spiral arms
{"Image DocumentName": "The Milky Way Galaxy Most stars are concentrated in spiral arms", "Image ImageDescription": "A galaxy is a great cloud of stars, gas, and dust bound together by the combined gravity of all the matter. Galaxies range from 1,500 to over 300,000 ly in diameter and can contain over 100 billion stars. Most stars are concentrated in spiral arms. Diameter of the Milky Way: ~75,000 ly.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}