astronomers-think-they-can-find-the-suns-lost-siblingshttps://www.astronomy.com/observing/deep-sky-objects/page/17/Deep-Sky Objects | Page 17 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/ASYLS0720_06.jpgInStockUSD1.001.00deep-sky-objectsrobotic-spaceflightthe-sunarticleASY2023-05-182020-07-0944894
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.