Galaxies spirales Structure Composition Diamètre Mouvement Évolution
{"Image DocumentName": "Galaxies spirales Structure Composition Diam\u00e8tre Mouvement \u00c9volution", "Image ImageDescription": "Planes. Bras spiraux. Composition. \u00c9toiles. Gaz. Poussi\u00e8res. Diam\u00e8tre. 30 kpc = AL. Mouvement. Rotation diff\u00e9rentielle du disque. \u00c9volution. Formation d\u2019\u00e9toiles. Enrichissement en \u00e9l\u00e9ments lourds.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}