Stellar dust, also known as interstellar dust or cosmic dust, refers to microscopic particles found in the space between stars in galaxies. These particles are primarily composed of a mix of silicate minerals, carbon compounds, and ices. Stellar dust plays a crucial role in the formation of stars and planetary systems, as it acts as raw material for the coalescence of gas and dust into larger structures like protostars and protoplanetary disks. Scientists study stellar dust to better understand the processes of star formation, the composition of cosmic bodies, and the evolution of galaxies. This research can help answer fundamental questions about the origins and composition of the universe.