The Sloan Digital Sky Survey (SDSS) is a major astronomical survey that has been ongoing since 2000. The project uses a dedicated 2.5-meter wide-angle optical telescope at Apache Point Observatory in New Mexico to map the universe. The SDSS has been instrumental in creating detailed three-dimensional maps of the universe, including galaxies, stars, and other celestial objects. The survey has also made important contributions to various areas of astronomy, such as the study of dark matter and dark energy, galaxy formation and evolution, and the large-scale structure of the universe. The data collected by the SDSS is publicly available and has been widely used by astronomers and researchers around the world. The survey has had a significant impact on our understanding of the universe and continues to produce valuable insights into various aspects of astrophysics.