what-the-interstellar-medium-tells-us-about-the-early-universehttps://www.astronomy.com/observing/deep-sky-objects/page/18/Deep-Sky Objects | Page 18 of 49 | Astronomy.comDeep-sky objects are celestial objects that exist outside our solar system. Three major types of deep-sky objects are nebulae, star clusters, and galaxies.https://www.astronomy.com/uploads/2021/09/PeriodicTable.pngInStockUSD1.001.00deep-sky-objectsarticleASY2023-05-182019-12-1243685
Deep-sky objects are celestial objects that exist outside our solar system. Three major types of deep-sky objects are nebulae, star clusters, and galaxies.