open-cluster-m18-globular-cluster-ngc-6584-and-spiral-galaxy-ngc-6221https://www.astronomy.com/observing/deep-sky-objects/page/46/Deep-Sky Objects | Page 46 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/Ara-1.jpgInStockUSD1.001.00deep-sky-objectsobservingarticleASY2023-05-182012-07-1239784
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.