Deep Sky Object
A "Deep Sky Object" (DSO) refers to any astronomical object located outside our solar system, typically found in the vast regions of space. These objects include galaxies, nebulae, star clusters, and other celestial formations that are not part of the planets or moons orbiting the Sun. DSOs are often studied by astronomers to understand the universe's structure and evolution.
Deep Sky Objects can be observed using telescopes, and many are cataloged in various astronomical databases. Notable examples of DSOs include the Andromeda Galaxy, the Orion Nebula, and the Pleiades Star Cluster. Observing these objects can provide insights into stellar formation and the dynamics of galaxies.