test-your-visual-acuity-with-the-theta-orionis-challengehttps://www.astronomy.com/observing/deep-sky-objects/page/6/Deep-Sky Objects | Page 6 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/ASYOM0223.jpgInStockUSD1.001.00deep-sky-objectsobservingarticleASY2023-05-182023-02-14112525
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.