Quasar spectroscopy is a branch of astronomy that focuses on studying the spectral characteristics of quasars. Quasars are extremely bright and distant celestial objects that emit large amounts of energy, primarily in the form of radiation. By analyzing the light emitted by quasars, researchers can gain insights into their composition, temperature, velocity, and other physical properties. Quasar spectroscopy involves using spectroscopic techniques to break down the light from quasars into its component wavelengths, allowing astronomers to identify specific emission and absorption lines that can provide valuable information about the quasar's properties. This data can then be used to investigate the nature of the surrounding gas and dust, the dynamics of the quasar's surroundings, and even the structure of the universe itself. Overall, quasar spectroscopy plays a crucial role in advancing our understanding of the universe and the phenomena that occur within it, helping to unravel the mysteries of these enigmatic and powerful cosmic objects.