track-down-the-25-best-planetary-nebulae-in-the-night-skyhttps://www.astronomy.com/observing/deep-sky-objects/page/16/Deep-Sky Objects | Page 16 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/2023/03/ASYPN0621_01.jpgInStockUSD1.001.00deep-sky-objectsobservingarticleASY2023-05-182021-06-29118984
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.