Astrophysical dust refers to small solid particles that are present in space, particularly in interstellar and interplanetary environments. These particles can be made up of various materials such as silicates, carbon, and metals. Astrophysical dust plays a crucial role in various processes in the universe, including absorbing and scattering light, forming planetary systems, and providing crucial building blocks for the formation of stars and planets. Studying astrophysical dust can provide valuable insights into the composition, evolution, and dynamics of the universe. Researchers often use telescopes and spectroscopic techniques to study the properties and distribution of dust in space.